This is a simple question and I just want confirmation before I buy the wrong power supply.
I am trying to test some LEDs which need about 2-20mA of current at 3.3v. I am gonna be testing a bunch so I need a variable power supply. The problem is that most power supplies have a current regulation of about 0.3% + 5mA. Looking at it I'm guessing that would cause some fluctuations but then I realized it also has a voltage regulation of about 0.3% + 5mV. If I use the voltage regulation at 3.3v and use a fixed resistor that should mean technically my current should only change at a value of VariableVoltage / FixedResistor and thereby essentially giving me a near constant current supply of around 2-20mA depending on resistors used right?