I need to power an OpAmp based circuit that will be connected to my Arduino Uno input. Since I have a 12V adapter for the Arduino board, I want to draw power from it for this opamp(LM358).

Does anybody know if there is any way I can do this from the Arduino board(pins?)is as opposed to having to solder wires directly to the bottom of the DC jack?

1 Answer 1


The Vin pin is available (next to Gnd) pins.

  • The voltage on Vin is after a protection diode. It will be around 0.7 V less than the supply voltage.
    – Nick Gammon
    Commented Jul 26, 2015 at 6:14

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