The control board need a 5V DC power source&time period; We advocate a 5V/3A DC supply&time period; The Vcc and Gnd pin are four/5 and 12/13 of CON4 respectively&period of time; You may obtain in other connectors some Vcc/Gnd pins, but we strongly counsel you employ those in CON4. If http://alexistzlz527.raidersfanteamshop.com/10-wrong-answers-to-common-ezcad-laser-questions-do-you-know-the-right-ones