LM317T 12V Lead-acid charger
... The charge indicator monitors the charge current and when this charge current decreases to the set level the LED is turned on. The colored wires are as follows: Red connected to point A, Yellow connected to point B, and Black connected to point C. All connections are to the charger schematic IC1 is ...
... The charge indicator monitors the charge current and when this charge current decreases to the set level the LED is turned on. The colored wires are as follows: Red connected to point A, Yellow connected to point B, and Black connected to point C. All connections are to the charger schematic IC1 is ...
Transformers - Noadswood Science
... through the wires and cables of the National Grid - when a current flows through a wire some energy is lost as heat - the higher the current, the more heat is lost To reduce these losses, the National Grid transmits electricity at a low current, however this needs a high voltage: ◦ P = V x I so to t ...
... through the wires and cables of the National Grid - when a current flows through a wire some energy is lost as heat - the higher the current, the more heat is lost To reduce these losses, the National Grid transmits electricity at a low current, however this needs a high voltage: ◦ P = V x I so to t ...
... design, i.e. 20A. Good resolution and accuracy were obtained, when the power factor improvement up to 0.95 have been achieved at different load currents. Five capacitors of the following values were used; 5µF, 10µF, 20µF, 40µF, 80µF with 300V. This combination can give a total capacitance between 5µ ...
J44094650
... microcontroller.Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches. The average value of voltage (and current) fed to the load is controlled by turning ...
... microcontroller.Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches. The average value of voltage (and current) fed to the load is controlled by turning ...
Solving high-voltage off-line HB-LED constant-current control
... Table 2: Experimental results with 12 HB-LEDS (two LUXEON flood 25-0032 boards) @ 350. mA Figures 2 and 3 indicate slightly worse ripple for higher input voltages as theory predicts, owing to the correspondingly small duty cycle. This suggests better performance in low mains-voltage regions such as ...
... Table 2: Experimental results with 12 HB-LEDS (two LUXEON flood 25-0032 boards) @ 350. mA Figures 2 and 3 indicate slightly worse ripple for higher input voltages as theory predicts, owing to the correspondingly small duty cycle. This suggests better performance in low mains-voltage regions such as ...
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Mitsubishi Electric to Ship InGaP HBT Power Amplifier for WiMAX Terminals. （PDF：39KB）
... WiMAX is growing increasingly popular for high-speed wireless communications use due to its extra wide area coverage compared to that of existing high-speed wireless services. To extend the communication range between WiMAX base stations and terminals, there is a growing need for compact power ampli ...
... WiMAX is growing increasingly popular for high-speed wireless communications use due to its extra wide area coverage compared to that of existing high-speed wireless services. To extend the communication range between WiMAX base stations and terminals, there is a growing need for compact power ampli ...
Some hints regarding Thevenin Equivalents and Circuits with
... Normally, one can find RTH by using RTH = (VOC / ISC ). However, what is the value of 0V/0A ??? The answer: we do not know. (RTH is NOT equal to 2R || R. You can only zero out independent sources.) A different approach is needed. RTH is the resistance seen looking back into the circuit when all inde ...
... Normally, one can find RTH by using RTH = (VOC / ISC ). However, what is the value of 0V/0A ??? The answer: we do not know. (RTH is NOT equal to 2R || R. You can only zero out independent sources.) A different approach is needed. RTH is the resistance seen looking back into the circuit when all inde ...
High Definition Stereo Headphone Amplifier Ear+ Purist HD Ear+ HD300
... for the tubes to reach operating temperature ready for use. During this time, you may hear a low level hum through the headphones, which will then disappear completely. The front panel volume control acts on both channels simultaneously. Tracking between channels is typically better than 0.5 dB over ...
... for the tubes to reach operating temperature ready for use. During this time, you may hear a low level hum through the headphones, which will then disappear completely. The front panel volume control acts on both channels simultaneously. Tracking between channels is typically better than 0.5 dB over ...
Electrical-and-Electronic-Principles-P1
... Using the triangle or the related formulae, finding the total current flowing through the circuit is easy enough. I = V/R ...
... Using the triangle or the related formulae, finding the total current flowing through the circuit is easy enough. I = V/R ...
Power electronics
Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)