I've been trying to design a latching relay driver circuit, with using a push-button switch. Basically when the circuit is powered on, first press in push-button switch make the relay SET, then the second press will make the relay RESET state.
I've searched online and find this normal relay driving solution. But I couldn't figure out how to implement this into single coil and/or dual coil latching relay. I guess dual coil latching relay is easier to drive than the single coil one.
Any help is appreciated. (if possible please provide falstad simulation)
Best Answer
There are many ways to do this. Discrete, D FF /2 counter Astable FF
Choose whatever Relay meets your needs and select Base R to drive 5% of Coil current. Use Darlington and 1% if this exceeds 20mA.
Avoid crosstalk of power grounds between Relay and CMOS , like the plague.