How is an led in cordless power tools (drills, saws, etc.) timed to cut off in x amount of time? Answered
I know a little about electronics (very little), and would like to learn more. I was wondering about what kind of circuit, or device is used to have the led turn off at a preset amount of time. My cordless drill has an led that turns on when I squeeze the trigger, and then doesn't go off for 20 seconds, every time. I would like to know so that I can learn how to design projects that might need to have something turn off at a preset time. Thanks to all!