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GPIO stands for General Purpose Input Output and can be used to receive and send digital signals to and from simple electronics from the Raspberry Pi.

GPIO stands for General Purpose Input Output and can be used to receive and send signals to and from simple electronics from the Raspberry Pi. Questions about software controller GPIO are also on-topic.

Introductory Questions

The following questions are introductory questions on subjects relating to the GPIO.

Make sure any external devices connect to these pins have matching voltage levels or you could damage your Raspberry Pi.

Mind the maximum current that GPIO pins can sink/source - both per pin and in total. Exceeding those limits could (permanently) damage the Pi.

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