DIY mini shields

For many projects you only need a few pins and the power lines GND and VCC. Have a look at the connectors IOL (d0 - d7), IOH (d8 - d13) and Analog (A0 - A5). Only the IOH contains the GND pin.

And there is also a AREF pin. Can this pin be used as power supply?

Well, if you do not need the analogRead(), and you only need a few milliamperes you can.

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