• After some more playing around I think I misunderstood the AC part.
    I don't think it requires AC but rather 'alternating' pulses. When wiring up the counter directly to pins A0 & A1 the following code works.
    Can you see any issues with this? It seems to work Ok, but I'm worrying I'm still misunderstanding something.

    var  on = false;
    setInterval(function() {
      on = !on;
      digitalWrite(A0, !on);
      digitalWrite(A1, on);
    }, 50);

Avatar for Owen @Owen started