Im trying to use a momentary switch and a relay to switch on an led which is on a completely different circuit. I want to know if I can use only a relay but not a flip flop. It sounds simple but I want the led to remain on after the momentary switch is released. There is a reason for this but its too hard to explain. This is what Im trying to do..... push momentary switch, led lights up, release momentary switch, led remains on and will remain on until reset. I tried using a relay but I cant get my head around it.