He tried the simple route and put a potentiometer in-line with the jacket. But he found that it got so hot, it began to smoke and melted his gloves. (The heater circuit draws upwards of 5 to 10 A.) ...

LED-driver circuits can be dimmed by applying a variable duty cycle (pulse-width modulation, or PWM) to the LED. PWM exploits LED behavior: At higher current levels, the LED’s ...