yeah cause the potential is different between +5 and +12
I've been reading about it a little between posts. Sounds like it's OK in practice, I think it's too easy though
I'd like to get a pwm hooked up on the 12v line eventually, something that can interpret an analogue POT as a trigger to change the pulse width, or like those capacitive touch switches on old TV's or lamp dimmers where you touch the lamp post to dim the light.