Ok I am pretty confused. Does constant current mean the current is limited but not to say the device will put the max current allowed? Or is constant current when the current to the device is constant at the max that u set it to be?
Example. Say I use a 10ohm resistor with an lm317, this gives me a constant current of 125mA. Now say I put a device on that only requires 20mA. Will that device only draw 20mA or will the constant current source force the whole 125mA on it?