If you look in eBay for Step Down modules, most of the modules you will see have 1 potentiometer, and that potentiometer enables setting the desired Output Voltage.
Here is an example for one like this:
Lately, I see some modules that have 2 potentiometers, but it's hard to understand from their description if the module enables setting the Maximum Current, or if it is a Constant Current module (in which the voltage changes but the Current stays fixed).
Sometimes they interchangeably mention both: Maximum Current setting, and Constant Current / LED Driver..
How can a module be both Maximum Current setting, and Constant Current / LED Driver? Those are 2 different behaviors, and there's no button to switch/choose 1 from the 2..
Does anyone have experience with those modules (that have more than 1 potentiometer), and can tell which behavior we would be getting from them?
Thank you very much