To incorporate LEDs into your favorite accessories, you’ll start by creating a basic circuit from a battery, two pieces of wire, and an LED. You’ll then modify this circuit so that you can turn it on ...

My whole circuit is 2 resistors, 2 LEDs, the phototransistor and the ATTINY45. I use the ADC to read the phototransistor. I have the Tiny sleep and only wake on light.

To counter the above described problems, this led dimmer project allows you to do the adjustment of the LED display’s brightness using just a few components. The series resistors are not needed ...

This custom circuit board picks up some of the pieces from a wall wart to drive a high-power LED.. The basic concept is to keep the high-voltage components and swap out the low voltage ones for ...

The Fig. 1 example includes LED loads D1 + D2, D3 + D4, D5 + D6 and a power-supply output voltage, with a constant output current, providing the circuit input voltage (V IN).