JTEX
Well-known member
Here's the simplest way I can think of how to use a momentary pushbutton to toggle a latching relay (dual coil, DPDT). It uses nothing but a few passives. It comes at the cost of using up an SPDT, but in some situations you don't need both.
If you do need more contacts, you can add a second relay, with only its coils paralleled to the first one. You'll have to double the capacitor values.
Hopefully it helps somebody as lazy as I am. It's not my idea. I just simplified and redrew the circuit I found in here:
https://www.eeweb.com/momentary-switch-teamed-with-latching-relay/
If you find an even easier way to do this, please do share. I've been looking in vain.
If you do need more contacts, you can add a second relay, with only its coils paralleled to the first one. You'll have to double the capacitor values.
Hopefully it helps somebody as lazy as I am. It's not my idea. I just simplified and redrew the circuit I found in here:
https://www.eeweb.com/momentary-switch-teamed-with-latching-relay/
If you find an even easier way to do this, please do share. I've been looking in vain.
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