C Circuit for Single Coil Latching Relay

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01:30:47

"C" Circuit for Single Coil Latching Relays

Use a single coil latching relay without a separate negative rail to trigger the coil in reverse. Use reverse output from a capacitor instead.

If using a push button, the button needs to be held until the capacitor is fully charged and until it's fully discharged.

I'd suggest using a DPDT On-On push button in that instance.
https://everycircuit.com/circuit/4848364570804224

Capacitor value:
L is coil inductance and R is coil resistance
C > ( 4*L ) / ( R^2 )

This simulation is for an application using a lithium battery. The relay isn't latching in the simulation but the coil is bipolar.

published 1 year ago

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