I'm working on a circuit that uses a NO pushbutton switch to activate the circuit, but turns it off when released. What I'd like is some way to wire in a circuit that allows me to use a NO switch but with the option to set the circuit to work normally (on/off with a single push) or latching (on till I press the switch again). So there would be 2 switches:
1) on/off
2) latching/non-latching

I'm suspecting logic circuits and/or relays may be involved. Any help would be greatly appreciated!

 

do a search for flip-flop. something like 7476 may do the job.

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Steve

 

An SCR will do this, use one switch to trigger it and another to bypass it therefore turning it off.

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I found a circuit that basically does what the switch already does here:
http://discovercircuits.com/DJ-Circu...13oneshots.htm
I'm just having trouble finding one that will stay latched until I hit the switch again.

 

This circuit alternates its output polarity for each push of the pushbutton. Push and it is on. Push again and it is off. Push again and it is on again, etc.

Attached Images

Alternate-action.gif (3.6 KB, 22 views)

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Uncle $crooge