Output plug: http://cafe.jeelabs.net/lab/op1/#index3h1 JeeNode v5: http://talk.jeelabs.net/topic/207 “To drive a small lamp or motor, you connect it between COM and the output pin(s), and you connect the power supply between COM and GND. You can probably find many examples when googling for details regarding the ULN2803 chip on that board.”