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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.

2
votes
I can certainly say that DNC2 and DNC3 are Ground and DNC1 if +5v, I have used those pins in previous projects and they have behaved as I would expect them to. My guess is that the DNC pins were rese …
answered Sep 14 '13 by Dan Nixon
2
votes
access GPIO are even more suited to needing root permissions than others, since GPIO can access physical devices rather then just data on a drive. …
answered Sep 22 '13 by Dan Nixon
3
votes
Audio signals are generated by the BCM2835s on chip DAC (connected via GPIOs 40 and 45), which has a driver for ALSA. I doubt you would be able to access the hardware directly as audio samples seem t …
answered Sep 16 '13 by Dan Nixon