The collector of the optocoupler phototransistor is connected to the emitter repeater on transistor Q2 and the signal from it is fed to the output of the circuit. The circuit parameters depend on the ...

So today we’ll stay with the Raspberry Pi ... and thus make for a better quality audio output from more recent Pi versions. This is a circuit that seems simple enough, yet there lurks a ...

It supplies power to the Raspberry Pi straight through the Pirelay 8 board. In a simplified way, PiRelay 8 channel is a set of eight relays with an optocoupler that uses light energy to safely ...