Im wanting to power my arduino via a battery pack. what kind of jack should be used, and is there any where on the arduino boards, uno and mega, that i can solder the wires to instead?

What kind of jack

knut_ny May 4, 2014, 11:16am 2

barrel jack 2.1mm inner 5.5 outer.

Power can be supplied to Vin-pin and gnd
If your supply is 5V (4V..5,5V) regulated - go to 5V-rail (bypassing onboard regulator)

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