I have a low end espresso coffee machine and I want to autofill the water resevoir with RO. I have a 120VAC solenoid with the fittings needed to fill the tank. Ideally, the solenoid would open under two conditions, 1) the coffee maker is turned on, and 2) the float switch indicates level is low.
I would like to use a 12VDC relay (or similar) to control the solenoid. I was thinking that I could put it inline with the float switch and the switch that turned on the coffee machine, converting it to 12VDC. I would like to supply 12VDC converted within the machine, if possible. It would need very low amerage for the relay so I believe I could get away with the smallest transformer. What circuitry would I need to build to accomplish this?
If there happened to be a 12VDC supply in the machine, that would make it simpler, but I would still like to know the circuit needed to build the 120VAC to 12VDC.
Thanks
I would like to use a 12VDC relay (or similar) to control the solenoid. I was thinking that I could put it inline with the float switch and the switch that turned on the coffee machine, converting it to 12VDC. I would like to supply 12VDC converted within the machine, if possible. It would need very low amerage for the relay so I believe I could get away with the smallest transformer. What circuitry would I need to build to accomplish this?
If there happened to be a 12VDC supply in the machine, that would make it simpler, but I would still like to know the circuit needed to build the 120VAC to 12VDC.
Thanks