eg...
whatever the resistor value, infact not even an LED< but any device on 5v.
point is, that's safe to do? draw a 5v supply but take the amps from the 12v rail?...
it's a little weird for me to get my head around lol... (collector 12v, emitter 5v, base 5v) if 5v is the "Switch" then the 5v allows emitter and collector to flow? but only up to the voltage
on the base pin?..
ok i get it, just weirded out by it (powering devices from 12v using nothing more than a low amp 5v rail? ?) weird.
