Wiring an 2 DC Barrel Jack - Arduino Forum Mar 15, 2012Hello everyone, how do I need to wire a simple 2 DC Barrel Jack? So where do I need to connect the three legs? It's for an external power source for a DC motor, and I don't know where to connect the three pins of the 2 jack.installing Panel Mount 2 DC barrel jackOct 24, 2015Will a power supply of 5v work for the DC barrel jack?Mar 23, 2014Can I power arduino with 12 through barrel jack?Apr 02, 2012DC power for USB ArduinoNov 17, 2006See more results Amazon: barrel jack connector SIM&NAT DC Barrel Power Plug Pigtail Cable, 2 x 5 Male Female Barrel Jack Connector Cord With Bare Wire for Security CCTV Parking Camera Car Monitor Surveillance ( 5.9 inch / 15 cm ) 3.9 out of 5 stars 14. $5 $ 5. 59. Get it as soon as Mon, Sep 30. FREE Shipping on orders over $25 shipped by Amazon.