- #1
nheugel
- 4
- 0
I am trying to design a circuit that has 20 mA acoss an LED, I had been advised I could use a voltage regulator to keep the current at 20 mA. However, I am not exactly sure as to how to set up the circuit. Would I set it up so that it would maintain a voltage and then run that voltage across a resistor to keep the current constant? or is there some other configuration I should be using?