I’m trying to attach an led to a power supply and an arduino, but I don’t understand how I should connect the wall power supply to the converter and from the converter into the power supply for the breadboard. Are there any things I could use?
The mains adapter has a voltage select switch underneath, what are the settings,? and the centre pin is usually Positive which will have a White stripe on the wire.
Adapter to the +/- 12V input, then the 5V output to the breadboard .