Powering Arduino from wall wart without 2.1mm connector.

Other Hardware General Electronics
1

Can I put the positive wire in the Vin header and ground to the ground header?

12vdc 1.0Amp

2

Yes.

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The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, speaker, microphone, light sensor, potentiometer, pushbuttons

3

Awesome.
Thanks