Showing posts with label Flashlight. Show all posts
Showing posts with label Flashlight. Show all posts

Monday, November 9, 2020

Constant current LED driver using ATtiny13 - Headlamp flashlight

Here is a simple constant current source for driving 7 white 5mm LEDs and also 2 red LEDs. I have made the circuit for a headlamp flashlight that had a soft button which required a microcontroller. To save the battery life the microcontroller is powering down when the lights are off with a current draw of only 0.3uA.

Constant current LED driver using ATtiny13 - Headlamp flashlight