What do the 3 pins on a 2.1mm DC power jack do? I am trying to hook one up to my breadboard but have had no success. I've soldered a wire to each port and tried hooking them into the power rails but no combination seems to work. I started with the two I was told were positive and negative.
Which prongs do I use for vmot and gnd? I've linked to the specific port I am using bellow.