L200 Light Controller

This is a circuit of L200 light controller. The output of this circuit is controlled by the surrounding environment’s brightness.  If the brightness increases, the output voltage will increases as well. Here is the circuit : The R1 and photoresistor are connected in parallel. They are used as regulator.  If we connect the the photoresistor in parallel with R2, we […]

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High-Brightness LED-Driver

This is a high-brightness LED-driver circuit. To provide a constant-voltage output we usually use DC/DC regulators. But constant-current output is the one that is needed in LED application. To provide a constant-current output, we can use this circuit. Here is the schematic diagram of high-brightness LED-driver circuit : This circuit uses R1 to sense the LED current. The TPS40211 is […]

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