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Topic: Arduino uno power supply (Read 2659 times) previous topic - next topic


How do I hook up a 5 volt regulated power supply to an arduino uno?
Is it +5v to Vin pin and 0v to one of the grounding pins?
Thank you in advance,


Regulated +5V DC goes to the +5V pin (connected to the output of the onboard regulator).

Unregulated +7v to +12v DC goes to the Vin pin (connected to the input of the onboard regulator).

In either case the ground/- side of the power supply goes to Ground.

The power jack connects to Vin and Ground so it is for 7-12V unregulated DC input power.
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thank you,
i now understand.

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