PDA

View Full Version : Extremely Dumb Question

The Thing
January 21st, 2006, 11:46 AM
I want to create a circuit that dims or brightens a LED.
I want the LED to glow BRIGHTLY as the environment around it gets darker, and vice versa.
I know I have to use a photovoltaic cell and maybe transistors, but the exact wiring of this circuit escapes me. I will probably also use a separate power source for the LED, but maybe not.
Help please!
5614
January 21st, 2006, 1:11 PM
Wire an LED and an LDR (light dependant resistor) as a potential divider.

Potential dividers are quite simple - look em up on google if you need to.
The Thing
January 21st, 2006, 1:17 PM
...
OMG OMG Thanks 5614.

Arrrg I need to go shoot myself.

EDIT: Crap, missed.