What is a constant current source?

I had some questions:

What is a constant current source?
How does a constant current source work?
Do i need a cc supply for an led or would a cv supply work?

Thanks :)

rickharris5 years ago
An electronic circuit that regulates the current it supplies. The current will be fixed at the value set by the circuit components.

This is ideal for running LEDS as they are current operate devices. IF you were to try and use a CV circuit then the current through the LED could change radically as the voltage changes as the resistance of a conducting LED is VERY low.

The easiest CC circuit is to use an integrated regulator This is a cct that Stev has posted regularly

+1 !!!
Thought I would save you posting the picture for once :-)