Just to prove it can be done on GPIO pins here it is in all it's glory. That's a hifiberry Amp on top of the Pi and it all fits in a case with a 18V supply powering it all, and chains used to be called layers. . .
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Just to prove it can be done on GPIO pins here it is in all it's glory. That's a hifiberry Amp on top of the Pi3 and it all fits in a case with a 18V supply powering it all, and chains used to be called layers. . .