Activating a relay off an LED circuit
Anyone had luck activating a small PCB relay off an LED circuit? What I would like to do is add a relay to get a make/break circuit that follows an LED. I'm assuming I'd just wire the relay in parallel with the LED but just 'upstream' from the LED's current limit resistor. Any other ideas? I do worry that whatever drives the LED won't have enough reserve capacity to power the relay coil. Wondering if I should actually cut the LED out of the circuit and use a set of relay contacts to light it from a different power source. Should an LED driver circuit be enough to run both the LED and relay coil or only one of them?