Free Simple Circuit Diagram
This is Single Cell LED Flashlight circuit. This circuit uses white LED that has best power-efficiency combination at about 20mA and requires abut 3.3V. Each Led in this circuit draws power about 66mW. This circuit uses seven LEDs. This circuit very useful for a tiny pocket flashlight because the whole array of leds run at close to one half watt. […]
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The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V by the Zener Diode D3 (24V) due to the very low current consumption of this circuit. The built-in microphone pick-up the music diffused by the loudspeaker(s) of any type of media player […]
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We can use ISL97676 as a LED driver that drives 6 channels of LED current for TFT-Display. The ISL97676 is used to drive 6 channels of LED to support 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias supply on the ISL97676 Vin pin. For non-uniformity of […]
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This is an Automatic LCD Panel Backlight Control circuit. This is a simple low cost implementation of an LED controller. It can compensate for aging effects and the temperature typically found in high power LEDs. This circuit consist of a photocell sensor and The AD5228 so the automatic brightness control can be achieved. The photocell’s resistance changes linearly and inversely […]
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