Tagged Questions

3
votes
3answers
574 views

Using a variable resistor to dim an LED

My question is this: Can I use a variable resistor to control the brightness of an LED? I was originally planning on using a potentiometer and an MCU to control the brightness with PWM, but that'd be ...
3
votes
7answers
843 views

how to drive a 1.35V led with a 1.4V AA battery

I would like to mount a TSAL6400 led on a single AA size battery box, with a simple ON/OFF switch. My problem is that the LED needs exactly 1.35V to function at its rated brightness. At this voltage ...