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Search results: 146   Output: 61-70
  1. Introduction A pulse width modulator (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller. The circuit described here is for a general purpose device that can control DC devices which draw up to a few amps of ...
  2. Introduction DC powered LED lighting circuits can vary from trivial single LED/series resistor combos to simple analog current regulators to more complicated switching power supply circuits such as this project. There is a tradeoff between ...
  3. Forrest Cook Introduction This circuit is for a solar powered white LED with automatic activation in the dark. It can be used for both indoor and outdoor night light applications. For indoor uses, if the circuit is operated near another lamp, it ...
  4. T.K. Hareendran This Outdoor LED Solar Garden Lights project is a hobby circuit of an automatic garden light using a LDR and 6V/5W solar panel. During day time, the internal rechargeable 6 Volt SLA battery receives charging current from the ...
  5. The project uses 7 RGB LEDs arranged in the form of dice.Each RGB LED has three separate LEDs inside so that makes a total of 21 LEDs and they have been controlled by 4 I/O pins of ATTiny13V Microcontroller.But according to the theory of ...
  6. Zhihong Yu, Juno Lighting Group, Des Plaines, IL; Edited by Martin Rowe and Fran Granville Power three to six LEDs from an ac- or dc-power source and charge a backup battery. LEDs find wide use in emergency lighting because of their high efficiency ...
    Circuits » Supply · Light » LT3517, LT3518, LTC4412, PB137
  7. Steffen Schütte Microcontroller : Microchip PIC18F2550 Sensor : DS18S20 temperature sensor Video: Temperature based color control CPU load based color control Screen based color control License: The source code of this work is licensed under a ...
  8. G. Forrest Introduction This circuit is a dimmable white LED lamp array with 18 LEDs. The lamp brightness is regulated as long as the input voltage is above 10.5V. A low-dropout analog voltage regulator is used for a simple and relatively efficient ...
  9. Here is the schematic of a simple fluorescent lamp driver circuit based on two transistors. The circuit uses capacitive ballasting for driving the tube. An 8 W standard fluorescent tube can be efficiently driven using the circuit. The two ...
  10. Description Here is a simple and effective circuit for driving florescent lamps from a 12 V supply. The circuit is nothing but consists of an oscillator, a MOSFET switch and a step-up transformer for driving the florescent lamp. The IC1 TLC555 is ...

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