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Latching switch to a momentary switch? Answered

Basically I want to make a toggle switch to trigger a circuit from on or off.

its hard to explain but when the switch is in the on position it triggers a circuit momentarily. When I switch the switch off i need it to trigger the circuit again.

Its for a 4 wheel drive module for my bronco and its momentary push buttons that I want t o convert to a toggle switch.


Try to replace the switch having on-off connections ( your present one) with switch having on-off-on connections. This will trigger your circuit both ways.

You need to build a one shot or mono stable cct from a 555 - see data sheet

If you are wanting to convert a push-button switch to a toggle switch, I would think about mounting a small lever above the button, an "L" shape, with the pivot at the angle of the L, and the top part of the L sticking out horizontally, so that when you press down on the L, the horizontal part presses against the push-button.

In the sketch, the green triangle is the pivot, and the red lump is the switch you already have.

pivot switch.JPG

I need to take a toggle switch and make it a momentary switch by electronics. Thanks for the help though.

What you want to look for is called a "one shot switch". It does exactly what you are looking for. When turned on it send one pulse you could wire two of them to a SPDT switch.

Depending on the switch you may be able to get inside it. if so, there is probably a latching mechanism of some sort possibly like that of a pen. if you can disable that mechanism w/o harming the functionality of the switch. otherwise, I would just get a new switch. Better safe than sorry, especially with moving vehicles!

I've taken apart enough switches to know the this is likely to not work.


6 years ago

They do make momentary toggle switches. Like a button, they pop right back into the "start" position (open or closed, depending on the switch) upon release...