This Instructable will show you how to built a Constant Current for high power LEDs, using only two components.
High power LEDs are getting cheaper and cheaper, however the constant current drivers, to drive them are pretty expensive.
Here, I'll show you how to built a simple and cheap, yet very effective constant current source.
The image shows the constant current driver hooked up to a 1W white Luxeon LED.
EDIT: This LED driver supports PWM
, which means that you can control the brightness of the LED(s). Those fancy and expensive drivers doesn't support that. I'll post some schematics and applications as soon as i have time.