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| + | ======Alan' | ||
| + | < | ||
| + | <h3 add_date=" | ||
| + | <dl> | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | Digest 176</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Changes</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Power Flow Overloaded Network - Bloomberg</ | ||
| + | < | ||
| + | frequently&# | ||
| + | caused by renewable energy from Germany, jeopardizing the | ||
| + | security of the network, grid operator CEPS said. The most | ||
| + | critical situation occurred in the period between Nov. 25 and | ||
| + | Dec. 16 when unscheduled power flows amounted to 3,500 | ||
| + | megawatts while the usual value is about 1,000 megawatts, the | ||
| + | Czech operator said in a statement today on its website. The | ||
| + | near-emergency situation in the network was mainly caused by | ||
| + | excessive power output from German wind farms on windy days. | ||
| + | The shutdown of German nuclear plants, the rise of installed | ||
| + | capacity in photovoltaic power plants in Germany and intensive | ||
| + | power trading on spot markets also played a part in the | ||
| + | network overloads, CEPS (PCZPBL01) said. CEPS has implemented | ||
| + | measures to identify and predict such situations and said the | ||
| + | risk of the recurrence of such situations in the future still | ||
| + | persists and the transmission networks in the region must be | ||
| + | reinforced as quickly as possible, it said. The country may | ||
| + | have to install transformers at the borders to protect the | ||
| + | grid at a cost of 2 billion koruna ($99 million), CEPS chief | ||
| + | Vladimir Tosovsky told reporters at a press conference in | ||
| + | Prague today, newswire CTK reported. CEPS already plans to | ||
| + | invest 3.5 billion koruna in the network in 2012, the newswire | ||
| + | reported.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Questions and Answers 1</ | ||
| + | < | ||
| + | Connections At service equipment the NEC permits the grounded | ||
| + | (neutral) conductor, the equipment enclosure, and the | ||
| + | grounding electrode conductor to all terminate together. Is it | ||
| + | permissible to land the equipment grounding conductors on the | ||
| + | neutral bus bar with the grounded (neutral) conductors, or am | ||
| + | I required to set a ground bar for the equipment grounding | ||
| + | conductors? A1: Equipment grounding conductors can terminate | ||
| + | on the same terminal bar with the grounded (neutral) | ||
| + | conductors, but this is only permitted if the panelboard is | ||
| + | rated service equipment and it is used as service equipment in | ||
| + | accordance with 230.71(A). However, each grounded (neutral) | ||
| + | conductor must terminate within the panelboard in an | ||
| + | individual terminal [408.21]. // Grounding Remote Building and | ||
| + | Structures NEC 250.32 allows the grounded (neutral) circuit | ||
| + | conductor supplying a second building to be bonded to the | ||
| + | equipment grounding conductor at the remote building. | ||
| + | grounding electrode system of the second building. If the two | ||
| + | buildings are electrically connected via a conductive path, | ||
| + | such as the shielding of a coax cable or water pipe, this | ||
| + | would provide an alternate path for neutral current to flow | ||
| + | during normal operation (like resistors in parallel). Is this | ||
| + | a trivial concern? Do you know of any problems that can arise | ||
| + | from such a situation such as GFI relays in the main service? | ||
| + | All those whom I have discussed this with have dismissed it as | ||
| + | trivial. They site residential houses connected via a common | ||
| + | water line.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | for Your Own Good</ | ||
| + | < | ||
| + | specific color code for ungrounded conductors, electricians | ||
| + | often use the following color system for power and lighting | ||
| + | conductor identification: | ||
| + | black, red and white • 120/208V, three-phase wiring — black, | ||
| + | red, blue and white • 120/240V, three-phase wiring — black, | ||
| + | orange, blue and white • 277/480V, three-phase wiring — brown, | ||
| + | orange, yellow and gray; or, brown, purple, yellow and gray On | ||
| + | the grounded side for neutrals, the wires have to be white or | ||
| + | gray. Buc prefers white at 120/240 (208) and gray for 277/480 | ||
| + | circuits. Green or bare wire is always the grounding | ||
| + | conductor. Personally, Buc specifies the latter 277/480 color | ||
| + | grouping; that removes the &# | ||
| + | confusion. Why? Orange is the only specified ungrounded | ||
| + | conductor and marks the &# | ||
| + | neutral delta configuration. For those unfamiliar: In wild leg | ||
| + | configuration, | ||
| + | provide 120 volts to neutral, but on the wild leg you will | ||
| + | find nearly 208 volts to the neutral. If you see an orange | ||
| + | wire in a panel, alarm bells of caution should go off in your | ||
| + | head. You don&# | ||
| + | 208 volt phase.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Significant Changes for the NEC 2008 -Part 4</ | ||
| + | < | ||
| + | to prevent inappropriate ground connections from happening | ||
| + | later on) // 2005 NEC&# | ||
| + | by Feeder(s) or Branch Circuit(s). (B) Grounded Systems. For a | ||
| + | grounded system at the separate building or structure, the | ||
| + | connection to the grounding electrode and grounding or bonding | ||
| + | of equipment, structures, or frames required to be grounded or | ||
| + | bonded shall comply with either 250.32(B)(1) or (B)(2). (1) | ||
| + | Equipment Grounding Conductor. An equipment grounding | ||
| + | conductor as described in 250.118 shall be run with the supply | ||
| + | conductors and connected to the building or structure | ||
| + | disconnecting means and to the grounding electrode(s). The | ||
| + | equipment grounding conductor shall be used for grounding or | ||
| + | bonding of equipment, structures, or frames required to be | ||
| + | grounded or bonded. The equipment grounding conductor shall be | ||
| + | sized in accordance with 250.122. Any installed grounded | ||
| + | conductor shall not be connected to the equipment grounding | ||
| + | conductor or to the grounding electrode(s). (2) Grounded | ||
| + | Conductor. Where (1) an equipment grounding conductor is not | ||
| + | run with the supply to the building or structure, (2) there | ||
| + | are no continuous metallic paths bonded to the grounding | ||
| + | system in each building or structure involved, and (3) | ||
| + | ground-fault protection of equipment has not been installed on | ||
| + | the supply side of the feeder(s), the grounded conductor run | ||
| + | with the supply to the building or structure shall be | ||
| + | connected to the building or structure disconnecting means and | ||
| + | to the grounding electrode(s) and shall be used for grounding | ||
| + | and bonding of equipment, structures, or frames required to be | ||
| + | gro</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Changes | NEC content from Electrical Construction and | ||
| + | Maintenance (EC and M) Magazine</ | ||
| + | < | ||
| + | (formerly 310.16) didn&# | ||
| + | Electrical Code and were therefore changed. While no technical | ||
| + | evidence was submitted showing insulation failure of the | ||
| + | conductors, this proposal was passed. The end result was a | ||
| + | change to the ampacities of: Copper conductors: 14, 12, 3, and | ||
| + | 1 AWG, and 600kcmil, 1,500kcmil and 2,000kcmil. Aluminum | ||
| + | conductors: 12, 8, and 6 AWG, and 300kcmil, 700kcmil, and | ||
| + | 800kcmil.</ | ||
| + | </dl> | ||
| + | < | ||
| + | </p> | ||
| + | </dt> | ||
| + | <dt style=" | ||
| + | font-size: medium; font-style: normal; font-variant: | ||
| + | font-weight: | ||
| + | orphans: auto; text-align: start; text-indent: | ||
| + | text-transform: | ||
| + | word-spacing: | ||
| + | <h3 add_date=" | ||
| + | <dl> | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | the internal makeup of the most commonly used meters for all | ||
| + | AC circuits. Forms 1, 2, 12, 14, 15, 16 are self-contained | ||
| + | meters. Forms 3, 4, 5, 6, 8, and 9 are instrument-rated | ||
| + | meters. The " | ||
| + | socket rated meter as opposed to an " | ||
| + | (A base) meter.</ | ||
| + | < | ||
| + | Home</ | ||
| + | < | ||
| + | maintaining electric power supply during periods when utility | ||
| + | power is lost. We also offer alternative power systems for | ||
| + | both grid-connected and off-grid locations.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Two-Phase Electric Solutions</ | ||
| + | < | ||
| + | like three phase, gives constant power transfer to a linear | ||
| + | load. But in a three wire system it has a neutral current | ||
| + | which is greater than the phase currents. Also motors aren't | ||
| + | entirely linear and this means that despite the theory, motors | ||
| + | running on three phase tend to run smoother than those on two | ||
| + | phase. The generators at Niagara Falls installed in 1895 were | ||
| + | the largest generators in the world at the time and were 2 | ||
| + | phase machines. True two-phase power distribution is | ||
| + | essentially obsolete. Special purpose systems may use a 2 | ||
| + | phase system for control. Two-phase power may be obtained from | ||
| + | a three-phase system using an arrangement of transformers | ||
| + | called a Scott T.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | Load Impacts of High SEER Residential HVAC Units</ | ||
| + | < | ||
| + | analyze the performance of presently manufactured air | ||
| + | conditioners operating at high ambient temperatures. The | ||
| + | design parameters that affect power draw under these | ||
| + | conditions were investigated. Four modified air conditioner | ||
| + | designs capable of reducing peak draw by at least 500 watts | ||
| + | were created and tested with a computer simulation. Major air | ||
| + | conditioner manufacturers were contacted regarding the | ||
| + | proposed modifications. The manufacturers indicated that in | ||
| + | principal it was possible to build units that meet the design | ||
| + | criteria. By providing a better understanding of air | ||
| + | conditioner performance on peak, this study will help PG& | ||
| + | ensure the effectiveness of residential air conditioner peak | ||
| + | load reduction programs. This study found that SEER rating is | ||
| + | not an accurate predictor of peak kW or kVA.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Projects</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Ministries Association USA (EMAUSA)</ | ||
| + | < | ||
| + | installing transformers, | ||
| + | < | ||
| + | add_date=" | ||
| + | Projects</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | - Customer-Owned Generation Homepage</ | ||
| + | < | ||
| + | add_date=" | ||
| + | School</ | ||
| + | < | ||
| + | and technicians sponsored by the City of Garden City, Kansas | ||
| + | Electric Cooperatives, | ||
| + | Wheatland Electric Cooperative. This school has been providing | ||
| + | quality training for the past 36 years. Instructors from | ||
| + | around the country share their expertise during the three-day | ||
| + | event. 400 electrical linemen and technicians with varying | ||
| + | levels of experience enjoy classes on a wide variety of | ||
| + | Underground, | ||
| + | provides more than 40 vendor displays to keep students well | ||
| + | informed about the latest changes in technology. Displays | ||
| + | range from underground radar equipment to bucket trucks to | ||
| + | state of the art metering products. The 37th annual UOM School | ||
| + | will be held February 8, 9, and 10, 2011. The $75.00 student | ||
| + | fee includes choice of classes for all three days plus an | ||
| + | evening banquet (Knights of Columbus - 205 N. 8th Street) with | ||
| + | entertainment.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Converters</ | ||
| + | < | ||
| + | vice versa to solve the common problem of electrical equipment | ||
| + | with different voltage requirements than the boat's electrical | ||
| + | system. 12-24/7A = $90</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Rappahannock</ | ||
| + | < | ||
| + | add_date=" | ||
| + | online reference on US-made watthour meters</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | SAVE MONEY, AND PROTECT YOUR ELECTRONICS AND APPLIANCES ... | ||
| + | EFFORTLESSLY!</ | ||
| + | < | ||
| + | spike protection</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | String Sizing Tool</ | ||
| + | < | ||
| + | based on model, voltage, charge controller, and ambient temp</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Sure-Volt&# | ||
| + | very fast response, high overload capacity, industrial-grade | ||
| + | durability and easy application as its big brother. The | ||
| + | Mini-EVR&# | ||
| + | packaged in a smaller, lower cost configuration for indoor or | ||
| + | outdoor application. But, most importantly, | ||
| + | offers superior protection from power quality problems without | ||
| + | busting your bottom line with high energy costs like | ||
| + | traditional power conditioners.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Pool Official Website</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | in single, split, or three phase</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | of economics at the University of Chicago and senior fellow at | ||
| + | the Hoover Institution. Nuclear power has other advantages. | ||
| + | Uranium is abundant, easily transported and efficient in | ||
| + | producing energy. One kilogram of natural uranium will yield | ||
| + | 20,000 times as much energy as a kilogram of coal. Nuclear | ||
| + | plants would reduce U.S. dependence on imports of natural gas | ||
| + | and oil. To the extent there is concern about running out of | ||
| + | fossil fuels -- a concern that I believe is greatly | ||
| + | exaggerated -- nuclear generation of electricity becomes even | ||
| + | more attractive.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | " | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Nuclear Energy</ | ||
| + | < | ||
| + | easily transported and efficient in producing energy. One | ||
| + | kilogram of natural uranium will yield 20,000 times as much | ||
| + | energy as a kilogram of coal. Nuclear plants would reduce U.S. | ||
| + | dependence on imports of natural gas and oil. To the extent | ||
| + | there is concern about running out of fossil fuels -- a | ||
| + | concern that I believe is greatly exaggerated -- nuclear | ||
| + | generation of electricity becomes even more attractive</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | ColdFire& | ||
| + | controller, 16-bit ADC, and metrology-specific peripherals | ||
| + | optimized for smart meter application. MCF51EM256 comes with a | ||
| + | full suite of hardware and software tools to make development | ||
| + | quick and easy.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Wind Power - Forbes</ | ||
| + | < | ||
| + | world as we know it. That&# | ||
| + | is saying to itself these days. And they aren&# | ||
| + | some Mayan doomsday nonsense. On Jan. 1 the federal production | ||
| + | tax credit on wind investments expires. For the past 20 years | ||
| + | the credit has offset about 30% of the cost of building wind | ||
| + | turbines. Add to that the &# | ||
| + | green energy mandated by 29 states, and as a result we&# | ||
| + | wind farms spring up across the country. Since 2007 nearly 40% | ||
| + | of all the new electricity capacity built in this country has | ||
| + | been wind. Wind now generates roughly 3.5% of U.S. | ||
| + | electricity. Don&# | ||
| + | level any time soon. The end of the tax credit could very well | ||
| + | mean the end of the wind industry. According to the federal | ||
| + | Energy Information Administration, | ||
| + | wind power (including capital and operating costs) is 8.2 | ||
| + | cents per kWh. Advanced clean-coal plants cost about 11 cents | ||
| + | per kWh, the same as nuclear. But advanced natural gas-burning | ||
| + | plants come in at just 6.3 cents per kWh. But it could be | ||
| + | getting a lot worse for wind. A fascinating new report by | ||
| + | George Taylor and Tom Tanton at the American Tradition | ||
| + | Institute called &# | ||
| + | asserts that the cost of wind power is significantly | ||
| + | understated by the EIA&# | ||
| + | generating electricity from wind costs triple what it does | ||
| + | from natural gas.%</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | windmill boy with big fans</ | ||
| + | < | ||
| + | transformed his village by building electric windmills out of | ||
| + | junk is the subject of a new book, The Boy Who Harnessed the | ||
| + | Wind.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | systems - Electronic Circuits Projects Diagrams Free</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | voltages above the threshold of 308 volts, the arc will become | ||
| + | self-sustaining.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Onan Generators</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Co, Inc. - Services and Products for Electric Power</ | ||
| + | < | ||
| + | on IPP Protection By Wayne Hartmann, Manager, Application | ||
| + | Engineering, | ||
| + | < | ||
| + | add_date=" | ||
| + | Planting Poles to Increase Electricity</ | ||
| + | < | ||
| + | customers will be added to the customers list of the LEC when | ||
| + | the process is fully implemented and that there will be | ||
| + | electricity supply lines running all over the country from | ||
| + | Foya to Bushanan, Gbarnga to Zwedru, Fish town to Barclayville | ||
| + | and Harper to Sanniquellie. // He said they will expand, | ||
| + | restore and rehabilitate sub-stations in Monrovia is what they | ||
| + | are doing now. He added that financial and other arrangements | ||
| + | have been completed and finalized and they are rebuilding | ||
| + | Stockton creek and upgrading it to sub-station level, while | ||
| + | constructing a new sub-station at Scheffelein. The minister | ||
| + | pointed out that they are building a 66kv high voltage lines | ||
| + | in Bushrod island to Paynesville and Scheffelein and once the | ||
| + | construction of those sub-stations are completed, it will now | ||
| + | be the delivery of electricity to Monrovia. He said after | ||
| + | Monrovia, they will embark on the pre-corridor project, which | ||
| + | is taking electricity outside Monrovia, adding that it | ||
| + | involves moving electricity from ELWA junction to Harbel, | ||
| + | Redlight and Kakata for which they have received the financial | ||
| + | commitment of donors // Minister Sendolo narrated that their | ||
| + | objective is to ensure that every city and town across the | ||
| + | country benefit from electricity, | ||
| + | electricity will be reduced to 20 cent. He said in the | ||
| + | funding, government is taking the lead as it allotted US$45 | ||
| + | million for the rehabilitation of the Mount coffee hydro | ||
| + | plant.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | grounding is named after a consultant working for the US Army | ||
| + | during World War II. The technique Mr. Ufer came up with was | ||
| + | necessary because the site needing grounding had no | ||
| + | underground water table and little rainfall. The desert site | ||
| + | was a series of bomb storage vaults in the area of Flagstaff, | ||
| + | Arizona. The principle of the Ufer ground is simple, it is | ||
| + | very effective and inexpensive to install during new | ||
| + | construction. The Ufer ground takes advantage of concrete&# | ||
| + | properties to good advantage. Concrete absorbs moisture | ||
| + | quickly and looses moisture very slowly. The mineral | ||
| + | properties of concrete (lime and others) and their inherent pH | ||
| + | means concrete has a supply of ions to conduct current. The | ||
| + | soil around concrete becomes " | ||
| + | result, the pH of the soil rises and reduces what would | ||
| + | normally be 1000 ohm meter soil conditions (hard to get a good | ||
| + | ground). The moisture present, (concrete gives up moisture | ||
| + | very slowly), in combination with the " | ||
| + | good conductor for electrical energy or lightning currents. | ||
| + | Ufer techniques are used in building footers, concrete floors, | ||
| + | radio and television towers, tower guy wire anchors, light | ||
| + | poles, etc. Copper wire does not function well as a " | ||
| + | ground due to the pH factor of concrete (+7pH is common). The | ||
| + | use of steel reinforcement as a " | ||
| + | concrete does not chip or flake as has been found with copper. | ||
| + | The use of copper wire tied to the reinforcement rods outside | ||
| + | the concrete shows none of these problems.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | March 2nd Work</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Government of Liberia - The New Dawn Liberia | Truly | ||
| + | Independent</ | ||
| + | < | ||
| + | has expressed the desired to get the Mount Coffee Hydro up and | ||
| + | running. I have read and heard about it requiring over two | ||
| + | hundred million United States dollars to achieve. The strategy | ||
| + | one uses in designing a system determines its cost. If GOL | ||
| + | wants to make good on this huge task of national interest, I | ||
| + | recommend a Liberian with many years of experience working to | ||
| + | keep a hydro operating right here in Liberia and he is in | ||
| + | charge of ensuring that Firestone Liberia meets its power | ||
| + | supply. The individual is Patrick Brown. With our government | ||
| + | full support, Patrick can restore our hydro. GOL should | ||
| + | negotiate with Firestone Liberia and lure him. He has what it | ||
| + | takes to do the job. Patrick manages a team of Liberians | ||
| + | operating and maintaining Firestone Liberia hydro. This | ||
| + | brother worked for LEC for many years at Mount Coffee. He | ||
| + | knows the facility well. I believe GOL should use him and give | ||
| + | him all the support to address the problems at our hydro. | ||
| + | Patrick knows what it takes to keep a hydro functional. I am | ||
| + | so convince that he will save us money; not cost been throwing | ||
| + | around here. Patrick commanding his team of Liberian engineers | ||
| + | and technicians at the Firestone Liberia hydro</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | from a GE transformer connections book copy righted in 1970. | ||
| + | Y-Y connected transformers, | ||
| + | units, are not capable of supplying an appreciable | ||
| + | single-phase load from line to neutral without a serious shift | ||
| + | in the position of the neutral, owing to the fact that the | ||
| + | corresponding primary currents of such loads, flowing through | ||
| + | the primaries of the unloaded phases, magnetize them. This | ||
| + | statement is primarily true for Y-Y connected single-phase | ||
| + | units and shell-type three-phase units. Core-type units, | ||
| + | however, may, on account of the interlinking of the magnetic | ||
| + | fluxes in the three legs, give tolerably good results under | ||
| + | conditions of single-phase loads from line to neutral or | ||
| + | unbalanced electrostatic charging currents. // The wye-wye- is | ||
| + | used under the same condition and to supply the same mixed | ||
| + | distribution loads as the delta-wye connection. The division | ||
| + | of load between transformers is also similar to t hat of the | ||
| + | delta-wye. CARE SHOULD BE EXERCISED IN MAKING THE WYE-WYE | ||
| + | CONNECTION TO MAKE SURE THAT A WIRE CONNECTS PRIMARY BANK AND | ||
| + | PRIMARY CIRCUIT NEUTRALS. iF NOT, TWO PRIMARY WINDINGS WILL BE | ||
| + | IN SERIES BETWEEN EACH TWO PHASE WIRES. Current into a | ||
| + | transformer from its phase wire can return only through the | ||
| + | other two phase since there is no neutral return. Thus , the | ||
| + | wye-wye without connected primary bank and primary source | ||
| + | neutrals can operate satisfactorily only when the load is | ||
| + | EXACTLY balanced between each phase and neutral on the | ||
| + | secondary with equal phase to neutral voltages. Only then will | ||
| + | the vector sum of the phase currents add up to zero at the | ||
| + | neutral point so that the return current equal zero.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | contractors: | ||
| + | analysis. Customer reviews of solar professionals pros. | ||
| + | Local directory for solar electric water pool heat | ||
| + | contractor. Findsolar</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | electricity in Liberia</ | ||
| + | < | ||
| + | government is asking for US$500 million for the complete | ||
| + | rehabilitation of the existing Mount Coffee Hydro Plant and | ||
| + | the construction of an upstream storage dam. Wind power, has | ||
| + | become one of the fastest growing sources of electricity | ||
| + | generation in the United States and the world, it is cheaper | ||
| + | and affordable for everyone.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | .: Create an energized Liberia : | ||
| + | < | ||
| + | 1998 with power conversion study funded by Danish Development | ||
| + | Agency http:// | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Specialist - NEETS</ | ||
| + | < | ||
| + | Series - The Navy Electricity and Electronics Training Series | ||
| + | (NEETS) was developed for use by personnel in many electrical | ||
| + | and electronic related Navy ratings. Written by, and with the | ||
| + | advice of, senior technicians in these ratings, this series | ||
| + | provides beginners with fundamental electrical and electronic | ||
| + | concepts through self-study. The presentation of this series | ||
| + | is not oriented to any specific rating structure, but is | ||
| + | divided into modules containing related information organized | ||
| + | into traditional paths of instruction. The series is designed | ||
| + | to give small amounts of information that can be easily | ||
| + | digested before advancing further into the more complex | ||
| + | material. For a student just becoming acquainted with | ||
| + | electricity or electronics, | ||
| + | modules be studied in their suggested sequence. While there is | ||
| + | a listing of NEETS by module title, the following brief | ||
| + | descriptions give a quick overview of how the individual | ||
| + | modules flow together.</ | ||
| + | < | ||
| + | Sockets Two Meters</ | ||
| + | < | ||
| + | improving metering function, installation, | ||
| + | across the electricity industry. Our initial products were | ||
| + | designed to allow metering all poly- and single-phase | ||
| + | installations using only two – and sometimes one – 9S meter. | ||
| + | However, with this efficiency came increased reliability, | ||
| + | safety and ease of installation. These important benefits have | ||
| + | eclipsed our initial technical advances.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Library Search</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Protection</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Not Going Nuclear (9780441319701): | ||
| + | < | ||
| + | comparison of health hazards across multiple electrical | ||
| + | generating technologies of which I am aware. He makes clear | ||
| + | that no technique for generating electricity is absolutely | ||
| + | safe. Each has its risks. However some are much more dangerous | ||
| + | to human safety and health than others. His energy book | ||
| + | carefully makes comparisons and shows that our failure to use | ||
| + | nuclear as the primary heat source for electrical power | ||
| + | generation has sentenced many people to premature death. | ||
| + | Nuclear power generation using U.S. technology is not only | ||
| + | safer in some aspects, but in all significant aspects. // | ||
| + | Since Dr. Beckman' | ||
| + | coal plants release enough uranium and thorium in their stack | ||
| + | gases and scrubber sludge to power a nuclear power plant | ||
| + | larger than the coal powered plant. One of the few significant | ||
| + | hazards of nuclear power is the release of radioactivity. Most | ||
| + | coal plants release too much radioactivity to operate if they | ||
| + | were regulated by the NRC. U.S. background radiation is about | ||
| + | 250 millirems per year (some locations in other countries have | ||
| + | levels 20 times higher). To this, nuclear power plants add | ||
| + | about 0.003 millirems. Living within 50 miles of a nuclear | ||
| + | power plant adds about 1/100 as much radiation as 1 old color | ||
| + | TV. Grand Central station in NY could not be licensed as a | ||
| + | nuclear reactor even without any fuel because its granite | ||
| + | blocks emit too much radiation. // In 1973 calculations show | ||
| + | that a small change in radiation levels at nuclear plants | ||
| + | would cost 800 million per saved life. The NRC mandated the | ||
| + | change. A similar calculation showed that</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Magazine April 1883 Artificial Aurora Borealis Artificial | ||
| + | Aurora borealis Prof S Lemstrom Finland - a set on Flickr</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | ASHI Reporter</ | ||
| + | < | ||
| + | Section 250.52(A)(3), | ||
| + | for grounding. Concrete Encased Electrode. An electrode | ||
| + | encased by at least 50 mm, (2 inches) of concrete, located | ||
| + | horizontally near the bottom or vertically, and within that | ||
| + | portion of a concrete foundation or footing that is in direct | ||
| + | contact with the earth, consisting of at last 6.0 m (20 ft.) | ||
| + | of one or more bare or zinc galvanized or other electrically | ||
| + | conductive coated steel reinforcing bars of not less than 13mm | ||
| + | (1/2 in) in diameter, or consisting of at least 6.0 m (20ft.) | ||
| + | of bare copper conductor not smaller than 4 AWG. Reinforcing | ||
| + | bars shall be permitted to be bonded together by the usual | ||
| + | steel tie wires or other effective means. Where multiple | ||
| + | concrete encased electrodes are present at a building or | ||
| + | structure, it shall be permissible to bond only one into the | ||
| + | grounding electrode system.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Harmonics & Transient Overvoltage Protection</ | ||
| + | < | ||
| + | Transient Overvoltage Protection course covers key power | ||
| + | quality issues that can adversely affect the operation of | ||
| + | programmable logic controllers, | ||
| + | other sensitive electronic equipment integral to process | ||
| + | control in all automated manufacturing environments. Through | ||
| + | effective single point grounding, control of harmonic currents | ||
| + | and proper transient overvoltage protection, attendees will | ||
| + | learn to better assure a minimum amount of equipment downtime.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | reviving sole power plant</ | ||
| + | < | ||
| + | has contracted US-based engineering company Stanley | ||
| + | Consultants to carry out studies on the feasibility of | ||
| + | resuscitating the country&# | ||
| + | damaged during the West African country&# | ||
| + | &# | ||
| + | given more than US$531 000 for the conduct of feasibility | ||
| + | studies on our damaged hydro plant, and Stanley Consultants | ||
| + | has been awarded the contract to do the studies and | ||
| + | [establish] the extent of the damage and the cost of | ||
| + | rehabilitating the dam,&# | ||
| + | head Harry Yuan says.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | plant in Liberia: waste rubberwood feedstock</ | ||
| + | < | ||
| + | Renewable Energies has pledged to construct a 35MW integrated | ||
| + | biomass electricity generation power plant in Paynesville to | ||
| + | supply electricity to Monrovia. Power supplies in Liberia' | ||
| + | capital are erratic, with the poor country' | ||
| + | facility - a large hydroelectric power plant - still damaged | ||
| + | because of the civil war that kept the West African country in | ||
| + | its grip for years.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Springs, Scrubber Technology In War On Coal » Media | ||
| + | Trackers</ | ||
| + | < | ||
| + | http:// | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Liberia Hydroelectric Dam - Stanley Consultants</ | ||
| + | < | ||
| + | Stanley Consultants was selected by the Liberia Electricity | ||
| + | Corporation (LEC) as the design engineer for the new Mount | ||
| + | Coffee 64 MW hydropower project on the St. Paul River in | ||
| + | Liberia, West Africa. Upon completion, it was named the Walter | ||
| + | F. Walker Hydro Dam and contained four vertical hydroelectric | ||
| + | generating units, 3 earth-filled dam sections, 10 flood | ||
| + | control gates, and a 69 kV substation and transmission line. | ||
| + | This facility became the country' | ||
| + | electricity. This facility operated successfully until 1990 | ||
| + | when the National Patriotic Front of Liberia took control of | ||
| + | the project site during the First Liberian Civil War and did | ||
| + | not permit LEC to open the tainter gates during high water | ||
| + | events. Eventually, the earth-filled dam was overtopped and | ||
| + | destroyed. Since then, the powerhouse has been vandalized, | ||
| + | looted and all mechanical and electrical systems have been | ||
| + | destroyed, leaving only the concrete substructure, | ||
| + | superstructure and steel penstocks. In 2007, Stanley | ||
| + | Consultants was again retained by LEC to determine the | ||
| + | feasibility of restoring the facility and to research the | ||
| + | project' | ||
| + | A damage assessment study and field observations were | ||
| + | performed on the dam in the areas of civil, geotechnical, | ||
| + | hydro-mechanical, | ||
| + | investigations, | ||
| + | requirements and the engineering work required to restore the | ||
| + | plant. In addition%2</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | practices, etc</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Ground to Building Ground?</ | ||
| + | < | ||
| + | separated by only 10 ft of earth, they are not electrically | ||
| + | insulated from each other. This medium-to-high impedance can | ||
| + | lead to a possibly harmful potential difference between the | ||
| + | grounding systems and the distribution system&# | ||
| + | grounding conductors. In B.T.&# | ||
| + | grounding connections of the system&# | ||
| + | (neutral): one at the transformer and the other at the | ||
| + | building&# | ||
| + | respective ground electrode. However, a reduced amount of | ||
| + | objectionable current will still flow across the earth gap, | ||
| + | separating the two grounding systems. Small voltages thus | ||
| + | generated are more than enough to create possible destructive | ||
| + | interference on digital control and communications networks | ||
| + | and computer-operated devices. Preventing this requires one | ||
| + | connection between the power system&# | ||
| + | just one of the grounding systems, with both grounding systems | ||
| + | then directly connecting together. This is permitted by Sec. | ||
| + | 250-21 of the NEC. &# | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | in an LED to give feedback on home energy usage.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Environmental, | ||
| + | < | ||
| + | provided conceptual design and feasibility study to redevelop | ||
| + | hydroelectric power and construct an upstream storage | ||
| + | reservoir. Located on the St. Paul River, Mt. Coffee formerly | ||
| + | generated 64 MW of power. Originally designed by Stanley | ||
| + | Consultants, | ||
| + | largest source of electricity and vital in their plans for | ||
| + | reconstruction and restoring commercial productivity. The | ||
| + | project consists of a 3-km-long, earth-filled dam that diverts | ||
| + | water to the intake structure. Penstocks then deliver the | ||
| + | water to the powerhouse containing four vertical Kaplan units. | ||
| + | The water is then returned to the river by a tailrace canal. | ||
| + | The earth-filled dam was breached when LEC personnel were not | ||
| + | allowed to raise the ten tainter gates that regulate the | ||
| + | reservoir&# | ||
| + | gates caused water to eventually crest the earth-filled dam, | ||
| + | creating a wide breach. As a result, the reservoir was drained | ||
| + | and the intake is currently above the water. Water now | ||
| + | bypasses the powerhouse, leaving the turbines dry. Subsequent | ||
| + | vandalism and looting removed virtually all of the mechanical, | ||
| + | electrical, and control systems from the powerhouse. The LEC | ||
| + | retained Stanley Consultants to prepare an updated feasibility | ||
| + | study for the redevelopment of hydropower at Mt. Coffee via | ||
| + | funding from the United States Trade & Development Agency. | ||
| + | The study included conceptual designs, cost estimates, energy | ||
| + | generation analysis, environmental review, and comprehensive | ||
| + | financial and economic analyses. Stanley Consultants has since | ||
| + | been retained by the Government</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | collaborative repository for research and development of | ||
| + | technology useful for interfacing energy sources, storage, and | ||
| + | loads to the Energy Grid.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Notebook Index of A...</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | the University of Tennessee, FNET is a low-cost, quickly | ||
| + | deployable GPS-synchronized wide-area frequency measurement | ||
| + | network. High dynamic accuracy Frequency Disturbance Recorders | ||
| + | (FDRs) are used to measure the frequency, phase angle, and | ||
| + | voltage of the power system at ordinay 120 V outlets. The | ||
| + | measurement data are continuously transmitted via the Internet | ||
| + | to the FNET servers hosted at the University of Tennessee and | ||
| + | Virginia Tech. The Power IT Lab has developed several | ||
| + | applications which use the FNET data to study the power | ||
| + | system, including: Event detection and location Oscillation | ||
| + | detection Animations of frequency and angle pertubations | ||
| + | Integration of renewables into the power grid Detection of | ||
| + | system breakup or islanding Prediction of grid instability and | ||
| + | reduction of blackouts Providing grid control input signals</ | ||
| + | < | ||
| + | add_date=" | ||
| + | <dd>A free series of textbooks on the subjects of electricity | ||
| + | and electronics</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | on energy usage</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | points worldwide</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Generators to The United Illuminating Co. Distribution | ||
| + | System</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | partnership with Seymour Hunter</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Power Tests Are On The Way</ | ||
| + | < | ||
| + | meter or UPS power supply that could monitor the AC power | ||
| + | consumption connected to a desktop power supply. Ideally, I've | ||
| + | been looking for such a solution that costs less than $100 | ||
| + | USD. This mission has now been accomplished with coming across | ||
| + | the Watts Up Power Meter Pro, per a reader recommendation. The | ||
| + | "Watts up? PRO" has a USB interface, provides an integrated | ||
| + | LCD for also monitoring the power consumption and other data | ||
| + | that can be toggled via two buttons, and accepts any US power | ||
| + | connection. This power meter also supports logging the power | ||
| + | data to the device itself and various other options from their | ||
| + | software. The company only makes Windows software, but from | ||
| + | their support page they reference a community-created | ||
| + | open-source utility. For a little more than 1,000 lines of C | ||
| + | code is this open-source utility that works under Linux with | ||
| + | the "Watts Up" brand power adapters. It supports dumping | ||
| + | various power metrics over USB, including the real-time | ||
| + | Wattage. The cost of the Watts Up Pro is $130 USD from the | ||
| + | manufacturer web-page but can be found for as little as $110 | ||
| + | from other Internet web-stores. I decided to buy one of these | ||
| + | units after seeing the features, open-source Linux support | ||
| + | (albeit spawned by the community), and the acceptable price.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | With Solar Panels Can Beam the Sun&# | ||
| + | Op-Ed - NYTimes.com</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Opportunities - Electricity</ | ||
| + | < | ||
| + | opportunities, | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Solid Oxide Fuel Cells</ | ||
| + | < | ||
| + | (SOFCs) hold the greatest potential of any fuel cell | ||
| + | technology. With low cost ceramic materials, and extremely | ||
| + | high electrical efficiencies, | ||
| + | economics without relying on CHP. But until now, there were | ||
| + | significant technical challenges inhibiting the | ||
| + | commercialization of this promising new technology. SOFCs | ||
| + | operate at extremely high temperature (typically above | ||
| + | 800& | ||
| + | electrical efficiencies, | ||
| + | contribute to better economics, but it also creates | ||
| + | engineering challenges. Bloom has solved these engineering | ||
| + | challenges. With breakthroughs in materials science, and | ||
| + | revolutionary new design, Bloom' | ||
| + | effective, all-electric solution.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | West Africa</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Levelized Costs of New Electricity Generating Technologies</ | ||
| + | < | ||
| + | costs for energy sources --</ | ||
| + | < | ||
| + | add_date=" | ||
| + | <dd>* Measures electric AC power on up to 12 circuits: o | ||
| + | Building-demand/ | ||
| + | (e.g., PV solar, wind) o Individual appliances, such as | ||
| + | geothermal pumps, AC, fridge * Supports wide range of current | ||
| + | transformers (CTs) to accommodate virtually any size | ||
| + | load/ | ||
| + | web-configurable * Built-in solid-state memory retains up to | ||
| + | 30 years of data * Internet-enabled but can also operate | ||
| + | autonomously without Internet connection * Free life-time | ||
| + | firmware upgrades * No service contracts * No maintenance * No | ||
| + | batteries to replace * Windows, Mac, Linux, & smart-phone | ||
| + | compatible. * For residential, | ||
| + | industrial use. * Google PowerMeter-enabled * BACnet | ||
| + | compatible * FCC and UL-61010 compliant * Lead-free and | ||
| + | RoHS-compliant * Made in USA</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Cyclone Engine</ | ||
| + | < | ||
| + | reciprocating steam engine. Can also run off waste heat from | ||
| + | other engines.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Smart Grid - Lisa Margonelli - National - The Atlantic</ | ||
| + | < | ||
| + | offer interest groups, or why it's a "good idea," but in how | ||
| + | it will empower consumers to save energy and money, encourage | ||
| + | innovation in technology and markets, and create a stable | ||
| + | atmosphere for investment and productive competition. What | ||
| + | would that look like? For starters, a consumer-focused grid | ||
| + | would make cooperation between utilities and their customers | ||
| + | part of the contract.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Alexis C. Madrigal - The Atlantic</ | ||
| + | < | ||
| + | consumption of data centers. Some people want to believe, | ||
| + | somehow, that Googling is energy intensive. But it's not. | ||
| + | Thanks to Koomey' | ||
| + | been getting more energy efficient: The number of computations | ||
| + | per kilowatt-hour of electricity usage has been doubling every | ||
| + | 1.5 years for decades. Relative to our society' | ||
| + | technological processes -- heating homes or growing corn or | ||
| + | ground transportation -- computing' | ||
| + | drop in the bucket. All of Google, all its servers and | ||
| + | campuses and everything, require about 260 megawatts of | ||
| + | electricity on a continuous basis, as of 2011. The US has | ||
| + | about 1,000 gigawatts of capacity, or 1,000,000 megawatts. So, | ||
| + | to put it mildly, I am sanguine about the electrical | ||
| + | consumption of our computing infrastructure. But, according to | ||
| + | a new report from the University of Melbourne' | ||
| + | Energy Efficient Telecommunications, | ||
| + | that let our devices tap into those data centers might turn | ||
| + | out to be another story. In a new whitepaper, the CEET | ||
| + | estimates that when we use wireless devices to access cloud | ||
| + | services, 90 percent of the electrical consumption of that | ||
| + | system is eaten up by the network' | ||
| + | servers or phones.. The data centers themselves use one-tenth | ||
| + | that amount of electricity. Worse, cloud services accessed | ||
| + | wirelessly will continue to explode, leading to a ballooning | ||
| + | electrical load as well. By 2015, they estimate this system | ||
| + | could eat up between 32 and 43 million megawatt hours. In | ||
| + | 2012, the figure was only 9 million megawatt hours.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Room</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Monitors & Displays | open4energy</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Product Catalog</ | ||
| + | < | ||
| + | that the Powerlet product uses. Similiar to the " | ||
| + | lighter" | ||
| + | access the battery without disassembling the bike. This form | ||
| + | factor is quickly becoming the industry standard powersport | ||
| + | connector.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | the U.S. - WSJ.com</ | ||
| + | < | ||
| + | supporters say they will be safer, cheaper and more efficient | ||
| + | than current plants. Here's a look at what's coming -- and | ||
| + | when.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Protect the Appliances in Your Home</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | buy today!</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Weaken Concrete?</ | ||
| + | < | ||
| + | engineers are always worried about corrosion due to dissimilar | ||
| + | metals (when you wire-tie the copper to the rebar) but IEEE | ||
| + | Green Book (or Emerald Book?) says that won't happen when | ||
| + | you're embedded in concrete. // When I worked for a large | ||
| + | consulting firm, our corrosion engineers looked at the | ||
| + | corrosion issue from time to time and always concluded that | ||
| + | there should little if any galvanic current between copper and | ||
| + | reinforced concrete.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Techniques, Safety, Calculations, | ||
| + | Standards in Electrical Installations</ | ||
| + | < | ||
| + | add_date=" | ||
| + | KVA, 60 HZ, PN 5617L |</ | ||
| + | < | ||
| + | > secondary 3 windings in series -- 30kva 3ph input, 20kva | ||
| + | single phase output, primary line currents imbalanced</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Techniques, Safety, Calculations, | ||
| + | Standards in Electrical Installations</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Converter</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Digital Converters | Analog Devices</ | ||
| + | < | ||
| + | proven and most preferred energy measurement technology in the | ||
| + | world. Your metering needs are met with best-in-class | ||
| + | performance, | ||
| + | cost. The Energy Measurement Products 12-Page Catalog features | ||
| + | integrated products for LCD Meters, pulsed output products for | ||
| + | stepper motor display meters and serial interface products for | ||
| + | LCD meters as well as 3-phase measurement and data | ||
| + | communications products.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | device is better suited to industrial applications</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Million for Hydro - Liberia Begins Borrowing Again</ | ||
| + | < | ||
| + | Monrovia that the Government of Liberia and the European | ||
| + | Investment Bank have completed the signing of a loan deal | ||
| + | worth US$65 million to finance the Mount Coffee Hydro. Liberia | ||
| + | is expected to pay back the money in 20 years at the interest | ||
| + | rate of 1.4 percent, meaning the country will have to pay | ||
| + | about US$73 million. Liberia only three years ago graduated | ||
| + | from a mammoth debt burden of at least US$5 billion, an amount | ||
| + | the country would never pay back in generations. Konneh said | ||
| + | the loan will enable government starts the renovation process | ||
| + | of the Mount Coffee Hydro which was destroyed more than 20 | ||
| + | years ago as result of the Liberian civil war. The hydro | ||
| + | powered the capital and its environs, but was systematically | ||
| + | looted during the war years. According to Konneh, a total of | ||
| + | US$200 million is needed to complete the renovation work on | ||
| + | the Hydro. In the same vein, he said Germany and Norway will | ||
| + | give to Liberia in grant the amount of US$35 million and US$75 | ||
| + | million respectively as support to rebuild the Hydro, while | ||
| + | Liberia will make an annual contribution of US$15 million | ||
| + | towards the project. Konneh noted that the Hydro, when | ||
| + | rebuilt, will produce about 80 megawatt of electricity, | ||
| + | something he said will be bigger than 20 [64] megawatts it | ||
| + | produced prior to its destruction. // The Mount Coffee Hydro | ||
| + | is expected to be completed in three years. It is also | ||
| + | expected by President Ellen Johnson Sirleaf that the hydro | ||
| + | will be officially turned on December 20, 2015.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | by GE GET-2485T</ | ||
| + | < | ||
| + | Manual -- Price: $27 Includes Shipping This simple type of | ||
| + | GENERAL ELECTRIC hand book (GE-2485 ) includes commonly used | ||
| + | distribution transformer connections and related information | ||
| + | including reference tables, voltages, diagrams, etc. and is | ||
| + | utlized by many electrical training classes. With the help of | ||
| + | this GE2485 book you can manage your transformer and | ||
| + | substation assets with the goal of minimizing cost and | ||
| + | downtime. Using the GE Distribution Transformer Manual in your | ||
| + | on-the-job LINEMAN training classes can help increase | ||
| + | reliability, | ||
| + | right knowledge and training.</ | ||
| + | < | ||
| + | protection products and lightning rods from Independent | ||
| + | Protection Co.</ | ||
| + | < | ||
| + | and designer in the structural lightning protection field. We | ||
| + | provide unparalleled products and services for all types of | ||
| + | structures -- including commercial and industrial buildings, | ||
| + | homes and historic landmarks. We'll even protect the trees on | ||
| + | your favorite golf course!</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | English Russia</ | ||
| + | < | ||
| + | hydro electric power plant images from repair work</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Implications of Exempting the Liberia Electricity | ||
| + | Corporation From Customs Duty On Fuel</ | ||
| + | < | ||
| + | the Government of the Republic of Liberia in the interest of | ||
| + | national reconstruction and development, | ||
| + | Order No. 51' granting 100% customs duty waiver on all fuel | ||
| + | and lubricants for the use of the Liberia Electricity | ||
| + | Corporation (LEC), the Liberia Broadcasting System (LBS), the | ||
| + | National Transit Authority (NTA), schools, clinics and | ||
| + | hospitals that are deemed by the Ministry of Finance to be | ||
| + | inadequately covered by Government' | ||
| + | or subsidies. // The electricity grid of LEC, which had a | ||
| + | total installed capacity of 191 megawatts (MW) of power by | ||
| + | 1989, currently generates only 22.6 MW of diesel power, of | ||
| + | which about 16 MW are effectively available. Less than 1% of | ||
| + | the population has access to public electricity (11000 | ||
| + | customers as of August 2012). This should be compared with | ||
| + | approximately 13% in 1989 (35000 customers). Given the | ||
| + | extremely high cost associated with diesel production | ||
| + | particularly due to high imported fuel cost, the generation | ||
| + | cost of LEC has been estimated at US $0.32/kWh compared with | ||
| + | average generation costs in Africa of US $0.18/kWh (Ref. World | ||
| + | Bank, 2011; EU, 2012). Consequently, | ||
| + | highest public electricity tariffs in the world despite | ||
| + | Government' | ||
| + | < | ||
| + | add_date=" | ||
| + | Description</ | ||
| + | <dd>A RIGrunner is the most convenient and safest way to connect | ||
| + | all your 12 VDC equipment to a power source. It is a 13.8 VDC | ||
| + | power panel that uses the excellent Anderson Powerpole& | ||
| + | connectors. Standardize all of your 12 VDC connections using | ||
| + | the amateur radio ARES & RACES, RSGB, ARRL Powerpole& | ||
| + | system.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Deal for Hydro!</ | ||
| + | < | ||
| + | or EIB Thursday sealed a loan deal worth EURO 50 million | ||
| + | (US$65m) as part of a financing arrangement for the Mount | ||
| + | Coffee Hydro Power Plant rehabilitation. The loan comes with a | ||
| + | high concessional interest rate of 1.42%, amounting to US8m | ||
| + | payable over the period of 20 years with 4-years grace period. | ||
| + | Government has put the total financing cost of the project to | ||
| + | EUR186, 200,000 (US$242 million). Of this amount Government is | ||
| + | providing US$47.1 million, while its European partners are | ||
| + | contributing EUR150 (US195 million). Norway and Germany have | ||
| + | already committed their support comprising the grant component | ||
| + | of EUR75 million (US$97.5 Million) and EUR25 million (US$32.5 | ||
| + | million) respectively.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Specifications</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Springs, Scrubber Technology In War On Coal | RedState</ | ||
| + | < | ||
| + | has been consistently cheaper than natural gas. Coal was $1.22 | ||
| + | per MMBtu (1 MMBtu = 293 kWh) in 1999 and $2.27 per MMBtu in | ||
| + | 2010, whereas natural gas was $2.57 per MMBtu in 1999 and | ||
| + | $5.09 per MMBtu in 2010. The Institute for Energy Research has | ||
| + | produced a report which projects the levelized cost of energy | ||
| + | production using different fuels, including natural gas | ||
| + | technologies, | ||
| + | costs for coal and some natural gas technologies are projected | ||
| + | to be similar in cost and capacity, wind and off-shore wind | ||
| + | provide a fraction of the capacity at a much larger levelized | ||
| + | cost. // levelized costs chart</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Photovoltaic Battery</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Power Conditioner</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | (Independent Minds) (9781905299836): | ||
| + | < | ||
| + | power for reliable electricity supply. In November 2008, the | ||
| + | Minister for Energy and Climate Change said that gas-fired and | ||
| + | coal-fired electricity cost & | ||
| + | to generate and nuclear power cost & | ||
| + | offshore wind cost & | ||
| + | the uneconomic option of wind power alive, the government has | ||
| + | made us all pay huge hidden subsidies, through our electricity | ||
| + | bills, to wind power companies. As the 2003 Energy White Paper | ||
| + | admitted, "We have ... introduced a Renewables Obligation for | ||
| + | England and Wales in April 2002. This will incentivize | ||
| + | generators to supply progressively higher levels of renewable | ||
| + | energy over time. The cost is met through higher prices to | ||
| + | consumers. ... By 2010, it is estimated that this support and | ||
| + | Climate Change Levy exemption will be worth around & | ||
| + | billion a year to the UK renewables industry." | ||
| + | Britain' | ||
| + | our electricity, | ||
| + | The 2008 House of Lords Select Committee on The Economics of | ||
| + | Renewable Energy said, "To make up for its intermittency ... | ||
| + | back-up conventional plant will be essential to guarantee | ||
| + | supply when required, to compensate for wind's very low | ||
| + | capacity credit. Wind generation should be viewed largely as | ||
| + | additional capacity to that which will need to be provided, in | ||
| + | any event, by more reliable means; and the evidence suggests | ||
| + | that its full costs, although declining over time, remain | ||
| + | significantly higher than those of conventional or nuclear | ||
| + | generation." | ||
| + | < | ||
| + | add_date=" | ||
| + | WHEAT: | ||
| + | <dd>f a proposal by the National Electric Reliability | ||
| + | Corporation (NERC) is approved, the vibrating reed meter may | ||
| + | be making a comeback. While utility companies have prided | ||
| + | themselves on maintaining accuracy, NERC is proposing a | ||
| + | year-long experiment to allow the frequency to drift, and see | ||
| + | if any problems result. It says the upside of looser | ||
| + | tolerances would be a more reliable grid and reduced operating | ||
| + | costs to the utilities. At the heart of the matter is a Time | ||
| + | Error Correction (TEC). As the line frequency drifts, the | ||
| + | electric companies intentionally create an &# | ||
| + | opposite direction. But here&# | ||
| + | Since most electric power producers are also connected to | ||
| + | other electric power producers, they all have to make a TEC at | ||
| + | the same time. Thus, everyone agrees to NOT try to achieve the | ||
| + | normal goal of sixty cycles per second. Instead, they all | ||
| + | generate a little more or a little less than the load demanded | ||
| + | by their customers to correct the time error. The NERC | ||
| + | estimates that with the proposed changes, fluctuations might | ||
| + | be greater on the East Coast, with clocks running up to 20 | ||
| + | minutes fast. On the West Coast, they would only gain about 8 | ||
| + | minutes.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | for contactors and motor starters - norm038.html</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | International</ | ||
| + | < | ||
| + | Management Contract of Liberia Electricity Corporation The | ||
| + | Liberia Electricity Corporation (LEC) on behalf of the | ||
| + | Ministry of Lands, Mines and Energy for the Government of the | ||
| + | Republic of Liberia (GOL) has selected MHI as the Operator for | ||
| + | a five year Management Contract in Monrovia. MHI will engage | ||
| + | in a variety of tasks to ensure the efficient operation of | ||
| + | LEC. These responsibilities will allow MHI to accomplish the | ||
| + | specific deliverables outlined in the five year management | ||
| + | contract including: a Business Plan, Electrical Master Plan, | ||
| + | Annual Investment Plan and Capital Budget, Annual Operating | ||
| + | Budget, Organizational Plan, Human Resource Plan, Training and | ||
| + | Development Plan, Utility Service Standards, Maintenance Plan, | ||
| + | Quality of Supply Plan, Quality of Service Plan, Customer | ||
| + | Database, Safety Plan and Procedures, Annual Reports, Revenue | ||
| + | Management Plan, Loss Reduction Plan, and a Financial Model | ||
| + | and Tariff Calculation.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | publication: | ||
| + | < | ||
| + | Systems, this " | ||
| + | information on the practices in some countries concerning | ||
| + | medium voltage, HV/LV substations, | ||
| + | industrial and tertiary distribution. | ||
| + | http:// | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Publications: | ||
| + | < | ||
| + | hazards that insulation faults may create for safety of | ||
| + | persons and property. It emphasises the influence of system | ||
| + | earthings on the availability of electrical power. It presents | ||
| + | the three most common system earthings defined in standard IEC | ||
| + | 60364 and used to varying degrees in all countries. | ||
| + | http:// | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | Wizard</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Techniques</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Powerpole Connectors - 1</ | ||
| + | < | ||
| + | add_date=" | ||
| + | of Contents</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Russia</ | ||
| + | < | ||
| + | hydro electric power plant - surveillance cameras</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Handbook, Second Edition (Electrical Engineering Handbook): | ||
| + | Leonard L. Grigsby: 9780849392931: | ||
| + | <dd>A reference at once so elemental and so comprehensive, | ||
| + | Electric Power Engineering Handbook not only describes the | ||
| + | field&# | ||
| + | contributors under the leadership of one of the world&# | ||
| + | respected and accomplished authorities in power engineering, | ||
| + | the second edition remains the undisputed guide to power | ||
| + | generation, transmission, | ||
| + | modeling, analyzing, planning, designing, monitoring, and | ||
| + | controlling power systems. This fully updated edition is now | ||
| + | available as a set of five books, each focused on a particular | ||
| + | area of expertise. Electric Power Generation, Transmission, | ||
| + | and Distribution Electric Power Substations Engineering, | ||
| + | Second Edition Electric Power Transformer Engineering, | ||
| + | Edition Power Systems Power System Stability and Control</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Adapters for the metering departments of electric utilities</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | reference design Product Summary Page</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | transformers, | ||
| + | < | ||
| + | transformers should be within 7.5% impedance.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Explosion | English Russia</ | ||
| + | < | ||
| + | hydro electric power plant is the biggest hydro power plant in | ||
| + | Russia, and the biggest (in terms of production) electric | ||
| + | generating unit in Russia. It&# | ||
| + | Megawatts and is in the Guinness records book. Now, today | ||
| + | messages started arriving about a huge explosion on the site. | ||
| + | Later, those were confirmed by some official media though | ||
| + | according to the witnesses they underestimate the damage. Here | ||
| + | we have the fresh shots from the territory surrounded by | ||
| + | emergency services. They tell that eleven people died and | ||
| + | fifty-six are missing. The signs of panic appeared among | ||
| + | locals from the surrounding villages and towns. They fear that | ||
| + | in case of further damage the dam could let the water freely | ||
| + | go thus meaning that thousand of houses would be flooded.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | University</ | ||
| + | < | ||
| + | Factor Specifying a Buck Boost</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | English Russia</ | ||
| + | < | ||
| + | hydro electric power plant is the biggest hydro power plant - | ||
| + | more pictures</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | 600 Vac, 250 Vdc</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | electricity grid. If the needle is too far to the left, it | ||
| + | means more generation is needed to meet demand. The meter | ||
| + | actually shows the grid's " | ||
| + | speed of rotation of generators all over the country. When | ||
| + | there is too little power available, the whole grid "slows | ||
| + | down" and the needle moves to the left. Why is this important? | ||
| + | It is important because it is possible to measure this signal | ||
| + | from any power outlet in the country. This means that it is | ||
| + | possible to design electrical appliances that know the current | ||
| + | imbalance on the grid. This is what dynamic demand control is | ||
| + | about. The device to measure grid frequency is very simple. | ||
| + | Here at Dynamic Demand, we built (at very little cost) a | ||
| + | device that continuously monitors the frequency on the | ||
| + | electricity grid and updates this website with real-time data. | ||
| + | Dynamic demand appliances would react to this very same | ||
| + | signal. When the needle is to the left, they would be more | ||
| + | likely to switch off, reducing the load on the grid and | ||
| + | helping to restore the balance. When the needle is to the | ||
| + | right, they would be more likely switch on, using up the | ||
| + | excess power. Millions of such devices acting together would | ||
| + | act like a huge, fast-reacting back-up system.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | consolidating new-found knowledge through presentation</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | systems, programming? | ||
| + | and other forums at allaboutcircuits. Ask your question at one | ||
| + | of the forums. Curious about questions your peers ask?</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | for Your Own Good</ | ||
| + | < | ||
| + | specific color code for ungrounded conductors, electricians | ||
| + | often use the following color system for power and lighting | ||
| + | conductor identification: | ||
| + | black, red and white • 120/208V, three-phase wiring — black, | ||
| + | red, blue and white • 120/240V, three-phase wiring — black, | ||
| + | orange, blue and white • 277/480V, three-phase wiring — brown, | ||
| + | orange, yellow and gray; or, brown, purple, yellow and gray On | ||
| + | the grounded side for neutrals, the wires have to be white or | ||
| + | gray. Buc prefers white at 120/240 (208) and gray for 277/480 | ||
| + | circuits. Green or bare wire is always the grounding | ||
| + | conductor. Personally, Buc specifies the latter 277/480 color | ||
| + | grouping; that removes the &# | ||
| + | confusion. Why? Orange is the only specified ungrounded | ||
| + | conductor and marks the &# | ||
| + | neutral delta configuration. For those unfamiliar: In wild leg | ||
| + | configuration, | ||
| + | provide 120 volts to neutral, but on the wild leg you will | ||
| + | find nearly 208 volts to the neutral. If you see an orange | ||
| + | wire in a panel, alarm bells of caution should go off in your | ||
| + | head. You don&# | ||
| + | 208 volt phase.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | voltage signal circuits - US Patent 4903161 Description</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | start controller. It accepts auto or manual commands & | ||
| + | monitors multiple start/stop fault conditions // The GSCM-mini | ||
| + | is an inexpensive, | ||
| + | controller. It supports three types of 2 to 3 wire generator | ||
| + | control for 3600 RPM hi speed gen.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | and Mount Coffee</ | ||
| + | < | ||
| + | add_date=" | ||
| + | www.wiringmanual.com</ | ||
| + | < | ||
| + | add_date=" | ||
| + | frequency</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Publications - Cahiers Techniques</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Residential Energy Systems...</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | - MERCER COUNTY ARES/ | ||
| + | < | ||
| + | ARES/RACES prescribes the 30 Amp Anderson Powerpole as the | ||
| + | standard dc power connector for use in EOC&# | ||
| + | its use by individual ARES/RACES personnel as well. Using this | ||
| + | standard, highly reliable connector allows quick and easy | ||
| + | installation and substitution of radios, power supplies, | ||
| + | batteries, and other equipment. Housings should be mated | ||
| + | according to the diagram above, viewing from the contact side | ||
| + | (opposite the wire side), tongue down, hood up, RED on the | ||
| + | LEFT, BLACK on the RIGHT. You may use a 3/ | ||
| + | roll pin, 1/4 inch long, to keep the housings from sliding | ||
| + | apart. www.andersonpower.com Anderson 1330 series Powerpole | ||
| + | connector part numbers: Red polycarbonate Housing (1 needed) | ||
| + | 1327 Black polycarbonate Housing (1 needed) 1327G6 30 Amp | ||
| + | Contacts (2 needed) 1331</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Object)</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | application designs.</ | ||
| + | < | ||
| + | come across. Very comprehensive and practical without the need | ||
| + | for excessive use of formulas. The knowedge shown in this | ||
| + | artical can only come from years of experience. "</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Co, Inc. - Services and Products for Electric Power</ | ||
| + | < | ||
| + | with the utility.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | L.L.C.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Manual</ | ||
| + | < | ||
| + | GET-2485 Barringer & Associates Ltd. is the distributing | ||
| + | agency for & | ||
| + | & | ||
| + | linemen. The pocket reference contains 110 pages in a 4 1/4" X | ||
| + | 8" wire-bound format. The price of $17.50 per copy includes | ||
| + | UPS ground shipping. Manual topics include: Ratings and | ||
| + | Applications; | ||
| + | Protection of Transformers; | ||
| + | may be ordered in any quantity. Orders for fewer than 25 | ||
| + | copies must be prepaid with a check made payable to | ||
| + | & | ||
| + | more will be billed by & | ||
| + | accompanied by a purchase order or ordered on company | ||
| + | letterhead. Barringer & Associates also has a limited | ||
| + | number of & | ||
| + | Transformer Connections, | ||
| + | paperback format. The publication price of $22 per copy | ||
| + | includes UPS ground shipping. Manual topics include: Polarity, | ||
| + | Phase Rotation and Voltage Diagrams; Transformer Connections; | ||
| + | Transformer Taps; Autotransformer Connections; | ||
| + | in Autotransformers in Y-Connection. You may mail your orders | ||
| + | to us at: Barringer & Associates Ltd. P.O. Box 1574 | ||
| + | Hickory, NC 28603 Or they may be faxed to 828.327.8440.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Wye vs Delta Wye Transformers</ | ||
| + | < | ||
| + | step-up</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | Power</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | Little Falls, Wisconsin</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | <dd>B SQUARE RANCH 3901 Bloomfield Hwy. Farmington, NM 87401 The | ||
| + | Bolack Electromechanical Museum is located on the B-Square | ||
| + | Ranch south of the San Juan River. Access is along a 60 acre | ||
| + | man-made lake, across an 1899 Railroad Bridge, which was moved | ||
| + | some 12 miles, and up to picturesque sandstone bluffs. Tommy | ||
| + | Bolack has been collecting artifacts representing electric | ||
| + | power, broadcasting, | ||
| + | over thirty years. Opened to the public in 1990, the 15,000 | ||
| + | square foot exhibit area and two acres outside, display many | ||
| + | aspects of industrial development. The largest standing | ||
| + | display of slate and marble switchboard from nine power plants | ||
| + | flank the north wall and represent the period from 1990 to | ||
| + | 1920. The craftsmanship and ornate nature of electric meters, | ||
| + | relays and generators have stood the test of time. Glass | ||
| + | insulators now stand as objects of beauty along with massive | ||
| + | generator engines. Many items are displayed so that " | ||
| + | views" maybe had. The now one-of-a-kind RCA 50E spread radio | ||
| + | station KOB's 50,000 watt A.M. voice throughout the southwest | ||
| + | fro over fifty years, Other early radio and television | ||
| + | equipment are assembled for display in the southern section of | ||
| + | the museum.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Global Source For Utility Products & Services</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | </dl> | ||
| + | < | ||
| + | </dt> | ||
| + | <dt style=" | ||
| + | font-size: medium; font-style: normal; font-variant: | ||
| + | font-weight: | ||
| + | orphans: auto; text-align: start; text-indent: | ||
| + | text-transform: | ||
| + | word-spacing: | ||
| + | <h3 add_date=" | ||
| + | <dl> | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Milestones - GHN</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | electrolytic capacitor issue that has been plaguing computer | ||
| + | hardware since around the turn of the century. More than | ||
| + | likely, if you're even reading this, you know what this site | ||
| + | is about... Incase you don't, just keep reading... The bad | ||
| + | capacitor issue really began to blossom into the mainstream as | ||
| + | a 'real world' problem around 1999, and continues on to the | ||
| + | present day. It now being 2009, I am STILL seeing later model | ||
| + | boards with this problem. // Badcaps.net is now in the process | ||
| + | of carrying a full line of soldering equipment and tools as | ||
| + | well as caps and repair services. Our goal is to make | ||
| + | Badcaps.net your one stop shop when it comes to repairing your | ||
| + | own board.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Layout Software, PCB Artist Software.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | SparkFun Electronics</ | ||
| + | < | ||
| + | circuit boards (PCB). One thing we've learned is that PCB fab | ||
| + | houses (such as Advanced Circuits, BatchPCB, PCB123, Gold | ||
| + | Phoenix, Bare Bones PCB, anyone really) have a very hard job | ||
| + | to do. Creating a PCB is not an easy task and there are many | ||
| + | ways for a fab house to mess it up. Unfortunately, | ||
| + | tend to spend less time on prototypes than on production runs. | ||
| + | Therefore, we try to design products and PCBs for | ||
| + | ' | ||
| + | minimize the number of ways the fab house can screw up a PCB. | ||
| + | We've messed up piles of PCBs over the years. We want to share | ||
| + | with you some of the DFM (design for manufacture) rules and | ||
| + | tricks and tips we've learned to get a good PCB, every time. | ||
| + | If you're creating a prototype PCB, we highly recommend you | ||
| + | use these rules to increase the chances that your proto will | ||
| + | work!</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Electronic, Industrial, Commercial, Residential New, New Old | ||
| + | Stock, and Used: FUSES - Hardware - Tools Bussmann - Gould, | ||
| + | Ferraz Shawmut (now Mersen) - Littelfuse - Edison Overcurrent | ||
| + | circuit protection products.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | - Custom Printed Circuit Board Manufacturer</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | good schematics - Electrical Engineering - Stack Exchange</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | ColdFire& | ||
| + | controller, 16-bit ADC, and metrology-specific peripherals | ||
| + | optimized for smart meter application. MCF51EM256 comes with a | ||
| + | full suite of hardware and software tools to make development | ||
| + | quick and easy.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | » Harrison&# | ||
| + | <dd>A little over a year ago, I became an Uncle. This is my | ||
| + | nephew, Harrison, doing what he does best – being cute. | ||
| + | Harrison For his first birthday, Harrison&# | ||
| + | him something really special. Not just an ordinary toy for a | ||
| + | one year old, but something strange and wonderful, tactile, | ||
| + | interactive, | ||
| + | box&# | ||
| + | buttons, knobs, levers, and sounds. An elite task force was | ||
| + | assembled to create this special gift, codenamed &# | ||
| + | Box&# | ||
| + | (alias mightyohm) the Engineer, and Kylie, the Project | ||
| + | Manager. Upon defining the project, we immediately jumped into | ||
| + | phase one, Procrastination. Deliverables were met, and as the | ||
| + | birthday loomed closer, we eased into phase two, Git &# | ||
| + | Done. Supplies and materials were ordered, wood chips started | ||
| + | flying, and soldering irons blazed. A short time later, the | ||
| + | front panel was realized:</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | v2 Serial SD Datalogger</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | — the industry' | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Analyzer for $129.50 (UART, SPI, I2C, 1-Wire)</ | ||
| + | < | ||
| + | your hobby projects! In the same box you get Oscilloscope, | ||
| + | Logic analyzer, Spectrum analyzer, Recorder and Logic | ||
| + | generator with a lot of potential, at an affordable price! | ||
| + | Simply connect the device to the computer USB port, run the | ||
| + | Windows application and you can analyze the UART, SPI, I2C and | ||
| + | 1-Wire interface signals.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | chargers, power supplies, DC converters</ | ||
| + | < | ||
| + | add_date=" | ||
| + | for technicians, | ||
| + | measurement, | ||
| + | < | ||
| + | services to businesses and individuals in several technical | ||
| + | areas through our network of consultants. Our emphasis is on | ||
| + | metrology, measurement and test, but other technical areas are | ||
| + | included in the available training.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Specialist - NEETS</ | ||
| + | < | ||
| + | Series - The Navy Electricity and Electronics Training Series | ||
| + | (NEETS) was developed for use by personnel in many electrical | ||
| + | and electronic related Navy ratings. Written by, and with the | ||
| + | advice of, senior technicians in these ratings, this series | ||
| + | provides beginners with fundamental electrical and electronic | ||
| + | concepts through self-study. The presentation of this series | ||
| + | is not oriented to any specific rating structure, but is | ||
| + | divided into modules containing related information organized | ||
| + | into traditional paths of instruction. The series is designed | ||
| + | to give small amounts of information that can be easily | ||
| + | digested before advancing further into the more complex | ||
| + | material. For a student just becoming acquainted with | ||
| + | electricity or electronics, | ||
| + | modules be studied in their suggested sequence. While there is | ||
| + | a listing of NEETS by module title, the following brief | ||
| + | descriptions give a quick overview of how the individual | ||
| + | modules flow together.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Linux. OpenEmbedded offers a best-in-class cross-compile | ||
| + | environment. It allows developers to create a complete Linux | ||
| + | Distribution for embedded systems. Some of the OpenEmbedded | ||
| + | advantages include: * support for many hardware architectures | ||
| + | * multiple releases for those architectures * tools for | ||
| + | speeding up the process of recreating the base after changes | ||
| + | have been made * easy to customize * runs on any Linux | ||
| + | distribution * cross-compiles 1000's of packages including | ||
| + | GTK+, Qt, the X Windows system, Mono, Java, and about anything | ||
| + | else you might ever need</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | documentation for electronics * projects and * ideas. Open | ||
| + | Circuits is a wiki for sharing open source electronics | ||
| + | knowledge, schematics, board layouts, ports and parts | ||
| + | libraries.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | PCBs</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Programmer</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Mount Soldering Tutorials - Skillet</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Headless Booting « Keith&# | ||
| + | < | ||
| + | connected. A few weeks ago I made a batch of VGA &# | ||
| + | trick the Minis into thinking a monitor was present. // — put | ||
| + | a resistor in the range of 75&# | ||
| + | pins (analog green signal to coax shield / ground). Some | ||
| + | computers apparently want all the analog lines terminated and | ||
| + | some even the sync lines, but the Mini is happy with just | ||
| + | green.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Massachusetts with a campus of corporate, manufacturing and | ||
| + | distribution facilities, is licensed and authorized by over 50 | ||
| + | semiconductor manufacturers to provide a continuing | ||
| + | manufacturing source for mature/ | ||
| + | Manufacturers that have authorized Rochester include AMD, | ||
| + | Analog Devices, Fairchild, Freescale, Intel, Intersil, | ||
| + | National, Texas Instruments, | ||
| + | manufactures thousands of devices in a variety of package | ||
| + | styles from commercial through space manufacturing flows. For | ||
| + | industries with long life cycles, Rochester provides a | ||
| + | continuing manufacturing supply of critical devices. Inventory | ||
| + | includes the world' | ||
| + | billion die and finished devices, over 5 billion. Rochester' | ||
| + | design and technology office, located in Rockville, Maryland, | ||
| + | provides complete silicon re-creation.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Open Source Hardware Work? « TheSurfersZone Random | ||
| + | Access</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | European – North America - Circuit symbols to DIN EN, NEMA | ||
| + | ICS/ | ||
| + | < | ||
| + | add_date=" | ||
| + | Radio Kits Sets Parts Supply Sale</ | ||
| + | < | ||
| + | Amateur Ham Radio Parts We are not just selling items for | ||
| + | Crystal Radios We sell many Hard to Find Electronic Parts for | ||
| + | the electronic experimenter.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | minimum 1x1" @ $2.50/sq in + $10 setup (15-20 days) [Spark Fun | ||
| + | Electronics]</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Mount Soldering Tutorials</ | ||
| + | < | ||
| + | Search</ | ||
| + | < | ||
| + | distributor search available today on the internet. After you | ||
| + | enter a part number (or substring), FindChips.com will | ||
| + | simultaneously query over 20 distributors, | ||
| + | responses to you in real time, in the order completed. | ||
| + | FindChips.com searches distributor inventory for all types of | ||
| + | electronics, | ||
| + | and more -- not just chips.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Electronics and Radio Today</ | ||
| + | < | ||
| + | are the basis for today' | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | Semiconductor Knowledge Base and Smart Selection Guide!</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Hotplate « Keith&# | ||
| + | < | ||
| + | proportional-integral-derivative</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Receivers Circuit Diagram</ | ||
| + | < | ||
| + | purpose-built 470kHz ceramic resonator as the oscillator, | ||
| + | rather than the original unstable L/C version. The 455kHz IF | ||
| + | signal from a shortwave receiver is fed into the input (pin 1) | ||
| + | of a double-balanced mixer and oscillator (IC1) via a level | ||
| + | adjustment pot (VR1). The NE506&# | ||
| + | AC-coupled to a PC&# | ||
| + | capacitor between pins 5 & 7 set to 150pF, the oscillator | ||
| + | frequency should be around 467.5kHz. You can check if the | ||
| + | oscillator is working by putting it near a receiver tuned to | ||
| + | 467kHz. You should hear a beat frequency. Circuit diagram:DRM | ||
| + | down-converter for 455kHz IF receivers DRM DownConverter | ||
| + | Circuit Diagram For 455kHz IF Receivers The IF signal of | ||
| + | 455kHz is mixed with 467kHz, giving an output with a centre | ||
| + | frequency of 12kHz. Sound cards should have no trouble | ||
| + | sampling the 10kHz-wide DRM signal.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | <dd>A free series of textbooks on the subjects of electricity | ||
| + | and electronics</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Library « Keith&# | ||
| + | < | ||
| + | reading multiple quadrature encoders.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Speaker Building, Home Audio and Video, Pro Audio, | ||
| + | Electronic Parts & Accessories</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | module reviews</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Batteries, Cable and Wiring at MCM Electronics</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Production & Testing</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Storage Oscilloscope w/2 Probes</ | ||
| + | < | ||
| + | channel digital oscilloscope. Using the PC's USB port for data | ||
| + | communications between the included hardware & software to | ||
| + | create the oscilloscope display on the PC's monitor allowing | ||
| + | you to preform functions the same as on a standard | ||
| + | oscilloscope. The unit ships with 2 probes, software CD, users | ||
| + | manual and USB cable. $170</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | software - Low cost circuit boards - Top quality PCB | ||
| + | manufacturing</ | ||
| + | < | ||
| + | one for drawing schematics, the other for PCB layout. | ||
| + | ExpressSCH ExpressPCB Both programs are completely free, fully | ||
| + | functional and easily installed with a single InstallShield | ||
| + | setup program. They run under Microsoft Windows NT, 2000, XP, | ||
| + | Vista and Windows 7. Learning to use our software is fast | ||
| + | because of its standardized Windows user interface. After | ||
| + | spending the few minutes to learn one, the other takes almost | ||
| + | no time because it works the same way.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Shield</ | ||
| + | < | ||
| + | fuse programmer for Atmel AVR microcontrollers. It currently | ||
| + | supports the ATmega48/ | ||
| + | The Rescue Shield is based on my Arduino-based AVR High | ||
| + | Voltage Programmer, but with several new features and | ||
| + | improvements.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | unique suite of RF design tools and computerized Application | ||
| + | Notes to make your wireless design job faster and easier. | ||
| + | AppCAD' | ||
| + | calculations quick and easy for many RF, microwave, and | ||
| + | wireless applications. AppCAD is useful for the design and | ||
| + | analysis of many circuits, signals, and systems using products | ||
| + | from discrete transistors and diodes to Silicon and GaAs | ||
| + | integrated circuits. The keyword for AppCAD is easy - no | ||
| + | circuit files, no manuals - just quick and easy.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | lacing cord :: Electronics and Radio Today</ | ||
| + | < | ||
| + | cable forms tidy and in place.</ | ||
| + | < | ||
| + | Research Foundation</ | ||
| + | < | ||
| + | purpose: To promote research in self-replicating manufacturing | ||
| + | systems and to distribute the results of that research freely | ||
| + | to everybody using open-source licensing.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | surface-mount construction - Wikipedia, the free | ||
| + | encyclopedia</ | ||
| + | < | ||
| + | add_date=" | ||
| + | and Diagramming Tool | DigiKey | Scheme-It</ | ||
| + | < | ||
| + | allows anyone to design and share electronic circuit diagrams. | ||
| + | The tool includes a comprehensive electronic symbol library | ||
| + | and an integrated Digi-Key component catalog that allows for a | ||
| + | wide range of circuit designs. Additionally, | ||
| + | of materials manager is provided to keep track of parts used | ||
| + | in a design. Once a schematic drawing is complete, users can | ||
| + | export it to an image file or share it via email with others. | ||
| + | Scheme-it works natively in all major web browsers without | ||
| + | requiring the use of any plugins. Only users registered at | ||
| + | www.digikey.com are able to share and save designs.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Symbols, Circuit Symbols</ | ||
| + | < | ||
| + | add_date=" | ||
| + | topic - Cigarette Lighter Alternatives -> EmPower ARINC | ||
| + | 628, PowerLe</ | ||
| + | < | ||
| + | add_date=" | ||
| + | " | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | solder - Hack a Day</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Component Distributor Inventory Search</ | ||
| + | < | ||
| + | original and fastest electronic part finder and chip search | ||
| + | engine. FindChips electronic components search engine scours | ||
| + | the leading distributors to give you instant inventory levels | ||
| + | and pricing around the world. parts stock</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Digital Converters | Analog Devices</ | ||
| + | < | ||
| + | proven and most preferred energy measurement technology in the | ||
| + | world. Your metering needs are met with best-in-class | ||
| + | performance, | ||
| + | cost. The Energy Measurement Products 12-Page Catalog features | ||
| + | integrated products for LCD Meters, pulsed output products for | ||
| + | stepper motor display meters and serial interface products for | ||
| + | LCD meters as well as 3-phase measurement and data | ||
| + | communications products.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | Semiconductor Physics ...</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Engineers</ | ||
| + | < | ||
| + | McMaster-Carr, | ||
| + | Plastics (custom plastic enclosures) GetThePatent.com, | ||
| + | PIC-SERVO motion control board, etc</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | add_date=" | ||
| + | Subwoofer Driver « Keith' | ||
| + | < | ||
| + | add_date=" | ||
| + | Largest Animated Magazine on TECHnology</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | power-line monitoring - 2002-01-10 08:00:00 | EDN</ | ||
| + | < | ||
| + | add_date=" | ||
| + | blinky blinky nerds!</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Hack a Day</ | ||
| + | < | ||
| + | Manufacturer, | ||
| + | Production, Annular Ring Boards, Circuit Board Fabrication, | ||
| + | PCB's Fabricator and Distributor</ | ||
| + | < | ||
| + | orders</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | LEDs arranged in a circle to represent the small and big arm | ||
| + | of an analog clock. If desired, it can also display the | ||
| + | seconds with a third color. The image above shows the | ||
| + | Bob-clock (v2.0 hardware, but v2.1 looks the same).</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Questions...</ | ||
| + | < | ||
| + | stories from the call logs of Analog Devices," | ||
| + | monthly in EDN and Design News. Technological troubleshooting, | ||
| + | insight and ideas from the experts at Analog Devices to help | ||
| + | solve your real-world application challenges.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Airport Audio Museum</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | - AboutUs Ranked Websites</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Compare, Buy</ | ||
| + | < | ||
| + | add_date=" | ||
| + | equipment for North America - Device or Function Code | ||
| + | Letters to NEMA ICS 19-2002</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Electronic Components and Semiconductors</ | ||
| + | < | ||
| + | add_date=" | ||
| + | & fun DIY electronics and kits</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | based battery monitor</ | ||
| + | < | ||
| + | leds</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Radio Feel</ | ||
| + | < | ||
| + | today&# | ||
| + | know that sometimes a MOSFET doesn&# | ||
| + | Over time, Frank began to recognize that the &# | ||
| + | of a MOSFET could become &# | ||
| + | degraded performance. However, a &# | ||
| + | diagnose. Some repairs are akin to &# | ||
| + | the bathwater&# | ||
| + | all of the MOSFETs. Good (and expensive) MOSFETs end up being | ||
| + | thrown away. Frank doesn&# | ||
| + | when doing repairs, given the cost of several hundred dollars | ||
| + | each. It&# | ||
| + | simple project will give you a method to verify the &# | ||
| + | performance of the RF MOSFET in question. Fig. 4: Brads and | ||
| + | buss wire serve as solder points for the components. You | ||
| + | likely have all of the parts somewhere in your shop. If you | ||
| + | don&# | ||
| + | you&# | ||
| + | Frank used a small block of plywood and some 1-1/2-inch brass | ||
| + | brads as the solder points, as shown in Fig. 2. The resistor | ||
| + | values are on the schematic in Fig. 3.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Acid Battery Meter</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | diodes. Each voxel is addressable by multiplexing the lattice, | ||
| + | making sophisticated animations an enjoyable scene on the | ||
| + | 8x8x8 LED display. The cube's main function is to be visually | ||
| + | pleasing. The eightCubed does this by showing geometric shapes | ||
| + | in the form of animations; each animation has 60 frames per | ||
| + | second. The animation videos in v1.0 are streamed to the | ||
| + | controller via USB by use of a PC application.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Motherboard Capacitors Howto</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Anima</ | ||
| + | < | ||
| + | by price)</ | ||
| + | < | ||
| + | add_date=" | ||
| + | dot/ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | lotta perfboard &# | ||
| + | < | ||
| + | jaw-droppingly complex example of a perfboarding project | ||
| + | (stripboard, | ||
| + | Dolby SR noise reduction circuit and was photographed by Mr. | ||
| + | Gregory Maxwell at the San Francisco Airport Museum' | ||
| + | of Audio exhibition. A few pics from the 2006 exhibit can be | ||
| + | found over at Stereophile.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | reference design Product Summary Page</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | Schematic Drawing Software</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | planets and a PIC 16F627</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | consolidating new-found knowledge through presentation</ | ||
| + | < | ||
| + | add_date=" | ||
| + | ,HID compatible, input device</ | ||
| + | < | ||
| + | additional buttons for my Carputer. -I needed an volume & | ||
| + | menu control knob, using common keys did not give me the | ||
| + | linear, fast control I needed. -(on-screen volume slider on | ||
| + | touch sensitive display was not good enough, because it | ||
| + | consumed display space.) -I wanted a circuit that could notify | ||
| + | my computer about low battery voltage, and hibernate it in | ||
| + | time. -I wanted a circuit that could detect when stopped the | ||
| + | engine, so the computer could offer to hibernate automaticly. | ||
| + | -I hoped to avoid the need of own USB driver, so it had to be | ||
| + | HID compliant device.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | systems, programming? | ||
| + | and other forums at allaboutcircuits. Ask your question at one | ||
| + | of the forums. Curious about questions your peers ask?</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Switches</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | my Video card help please!</ | ||
| + | < | ||
| + | FM series (DigiKey).</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | 3x3x3</ | ||
| + | < | ||
| + | add_date=" | ||
| + | of Electricity -...</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | bunnie' | ||
| + | < | ||
| + | add_date=" | ||
| + | Brass)</ | ||
| + | < | ||
| + | this pre-sensitized plate, including encoder, surface mount | ||
| + | device solder paste stencil or radio frequency shielding | ||
| + | screen. Made with high quality thin steel or brass plate, | ||
| + | laminated both sides with high resolution photosensitive film. | ||
| + | Use Sodium Carbonate/ | ||
| + | Chloride solution for etching.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | « Interesting Bytes : Hardware, Software, and | ||
| + | Consulting</ | ||
| + | < | ||
| + | hardware from your computer. You can also program the ATMEGA32 | ||
| + | microprocessor to do anything you want. The Open-USB-IO board | ||
| + | will plug into the USB port on a Linux, Mac or Windows | ||
| + | computer ( Vista or XP) and provide a variety of digital and | ||
| + | analogue inputs and outputs including 7 motor drivers, RS-232, | ||
| + | an LDR, Pulse Width Modulators, and more. No special software | ||
| + | drivers are required just a simple command line or GUI | ||
| + | program. The board is ideal for controlling real hardware from | ||
| + | a USB port and for programming at the level of command line or | ||
| + | script, C++ on the PC, or C and assembler on the ATMEGA32 | ||
| + | microprocessor that is the heart of the board. See | ||
| + | www.pjradcliffe.wordpress.com for more details, an excellent | ||
| + | reference manual, required programs and more.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Using gEDA</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Retromaster&# | ||
| + | < | ||
| + | home workshop for quite some time now. This page is an attempt | ||
| + | to document the processes I usually follow and experiences | ||
| + | I&# | ||
| + | at home (e.g. using toner transfer) have been quite well | ||
| + | documented throughout the net. My intention here is not to | ||
| + | provide a tutorial covering the basics. Instead, I briefly | ||
| + | cover my own setup and processes from start to finish and | ||
| + | share some of my own experiences as well as elaborate on some | ||
| + | usually overlooked topics such as vias and soldermasks.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | hardware from your computer. You can also program the ATMEGA32 | ||
| + | microprocessor to do anything you want. The ATMEGA32 code can | ||
| + | use the USB interface to the PC and you can debug the code | ||
| + | with a powerful built-in symbolic debugger. The Open-USB-IO | ||
| + | board will plug into the USB port on a Linux, Mac or Windows | ||
| + | computer ( XP, Vista or Windows 7) and provide a variety of | ||
| + | digital and analogue inputs and outputs including 7 motor | ||
| + | drivers. No special software drivers are required just a | ||
| + | simple command line or GUI program. You can control the | ||
| + | hardware from command line, script, or your own programs on | ||
| + | the PC. You can also program in assembler or C the ATMEGA32 | ||
| + | microprocessor that is the heart of the board.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Lives On in Silicon Valley - NYTimes.com</ | ||
| + | < | ||
| + | keeping unsold products on their shelves for 30 years. Not | ||
| + | Halted Specialties Company. It&# | ||
| + | thousand vacuum tubes just in case the right buyer happens to | ||
| + | wander into the store, be it this decade or the next.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Capacitors - Polymer Capacitors</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Well Switching Power Supply Manufacturer</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | to 5v converter, 48v to 12v converter, 12v to 24v converter, | ||
| + | 36v to 12v converter</ | ||
| + | < | ||
| + | add_date=" | ||
| + | Power</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | (OBD2) monitoring.</ | ||
| + | < | ||
| + | add_date=" | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | NiMH Battery C...</ | ||
| + | < | ||
| + | < | ||
| + | add_date=" | ||
| + | Engineers - Electrical, Mechanical, Electronics, | ||
| + | Chemical, | ||
| + | < | ||
| + | add_date=" | ||
| + | & Surge Suppresor Information</ | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | device that would communicate with any OBD-II enabled car and | ||
| + | read back real time data as well as perform basic performance | ||
| + | testing and diagnostics.</ | ||
| + | </dl> | ||
| + | < | ||
| + | </dt> | ||
| + | <dt style=" | ||
| + | font-size: medium; font-style: normal; font-variant: | ||
| + | font-weight: | ||
| + | orphans: auto; text-align: start; text-indent: | ||
| + | text-transform: | ||
| + | word-spacing: | ||
| + | <h3 add_date=" | ||
| + | <dl> | ||
| + | < | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | 2008</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | < | ||
| + | conference over the weekend, Liberia&# | ||
| + | Counselor Watkins Wright said government engaged the ELWA | ||
| + | management sometimes ago to purchase 14.5 acres of the one | ||
| + | hundred and thirty five acres of land to build thirteen | ||
| + | ministries. He said the Liberian government told the ELWA | ||
| + | management that the 14.5 acres will be purchased at the | ||
| + | prevailing rate, but the ELWA management failed to accept the | ||
| + | offer. The Liberia Solicitor General noted that as a | ||
| + | &# | ||
| + | Court,to peacefully and lawfully resolve the issue, but | ||
| + | according to him, ELWA remains adamant, intransigent and | ||
| + | un-cooperative, | ||
| + | institutions and individuals, | ||
| + | to withdraw the case and pursue other options.</ | ||
| + | < | ||
| + | href=" | ||
| + | add_date=" | ||
| + | Ministries Association USA (EMAUSA)</ | ||
| + | < | ||
| + | installing transformers, | ||
| + | < | ||
| + | add_date=" | ||
| + | <dd> Cedarville Mechanical Engineering class project on ELWA Power system cooling pond with report. As a point of reference, the 20x30x3' | ||
| + | </dl> | ||
| + | </dt> | ||
| + | |||
| + | </ | ||
reference/bookmarks.txt · Last modified: 2018/05/28 22:29 by 127.0.0.1
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