Latched On/Off to Momentary with Reverse Polarity by State

Hi The solenoid I currently use in my RV is continuously on when engaged and draws 3.7amps of power which is a lot when there is no external source of power. So I have a new solenoid that latches on and off and draws no power once in the final state, but it uses a momentary input that must switch polarities each push. The diagram for the latched on/off relay giving a momentary pulse in the relay section will work for the on state, but not the off state. The new solenoid opens with a pulse of +12v to terminal 1 and ground to terminal 2. The solenoid closes (switches state) with a pulse of 12v on terminal 2 and a ground on terminal 1. I have a on/off switch in place for these signals. I can't change the switch because other circuitry depends on the on/off state. Can someone suggest a schematic for this please.Thank you for the advice

Robert

Change the switch to 3PDT (ON-ON) switch. Wire two of the center terminals to a 100uF NON-Polarized capacitor in series with the relay coil. Wire those end terminals to your positive and negative wires. +     C       - -     R       + X     X       X Use the remaining set of contacts for the other dependent circuitry.

Thank you for your reply. I am having difficulty understanding the wiring. I wire a capacitor across the two end terminals with the 12v to the one side of the capacitor and the other to ground, then connect the relays + and - to the center two terminals, then use the remaining terminals marked X X X for the exiting wires. Is this correct?Thank you for the advice

Robert

blewis9991 wrote: Thank you for your reply. I am having difficulty understanding the wiring. I wire a capacitor across the two end terminals with the 12v to the one side of the capacitor and the other to ground, then connect the relays + and - to the center two terminals, then use the remaining terminals marked X X X for the exiting wires. Is this correct?

Almost correct. You wire capacitor terminal 1 to "C". Capacitor terminal 2 connects to one of the relay coil terminals. The remaining relay coil terminal connects to "R". Sorry, I didn't have time to draw this out for you.

Did you get your project working?