High power LED simple driver-----simple LED driver

The C4 capacitor is a 473 monolithic capacitor. D3 refers to two 1N5819s in parallel.

High power LED simple driver, which is used on high power white light, but I use 3W LED. The circuit input is 1.2V (high capacity NI-MH battery) and the current is about 1.4 to the efficiency is not very high, about 70%. If the 150 ohm resistor is replaced with a 200 ohm resistor, the input current is reduced to 1.0 to

The D882 needs to be equipped with a small copper sheet with an area of ​​about 3 square centimeters for heat dissipation. I used diagonal pliers to clamp off the head of the D882 (to reduce the volume), and then directly soldered it to the copper sheet (similar to SMD)