How can i activate a circuit from another circuit?

Question

There is two circuits, and if one is active (flowing current) then it opens a switch in another. Some would say that is a relay, but the problem is, the circuit which activates that switch, only has a pulse. What I mean is the circuit is only complete for a short time, and needs to toggle the switch on and off everytime there is a pulse of current which flows through the circuit. The situation is a modern computer power button, which closes the switch when it is pushed, but when released, it breaks the circuit again. How can I make that circuit toggle the switch on the second circuit everytime current puslses through. For example, a pulse passes through, the switch is toggled on. Then another pulse is passed, the switch is toggled off. Then another toggles on etc.

Answer 1

It is a standard logic block called a T-type flipflop. Other flipflops can be made to do the same task.

Answer 2

You need a certain kind of switch. It is common. It is called a Push-Push Switch (e.g. SPST = ON-OFF)

This looks like a momentary action push switch but it is a standard on-off switch: push once to switch on, push again to switch off. This is called a latching action.

For your case you would need the first circuit to power a solenoid to push the switch, which alternates from push-on to push-off and back.

;-D Electrons can be fun.