I have a dual throw momentary switch. In the closed position (see below) it shows constant continuity thru an LED which I would also like to use as a counter. Or really an indicator that the switch has been thrown. The other half of the switch is not really in question. I show an optocoupler here.
So once I throw the switch I want the LED to turn off. And stay off. Even if the switch is pressed again. This would serve as an indicator that the switch has been already pushed once. When power to the circuit is turned off the flip is reset.
I thought of using an SR Flip Flop, but don't think this will work since I need to see continuity once I power the circuit. I would welcome any ideas and sketches. Thanks!