07-04-2018, 07:07 PM
Hi Jared, you connect the other side of switch to +5v as you did with the jumper. This sends +5v (actually +3.3v because of voltage divider) to Arduino pin. On the board just above those ports you'll see a section for pullup/down resistor, I've put both pads so it can be more flexible and mount a pulldown resistor on each of those ports which keeps it off (0v) when nothing is plugged in.