I got the bright idea of using a PID and a 12V solenoid gas valve to regulate the temperature on a propane pot.
The PID does not generate enough amps to operate the solenoid, so I went to a SSR and a 12 volt battery. The solenoid heats up more than it should when direct wired to the battery. To solve this I put in an element from a sandwich maker (about 200 watts) as a resistor - too much resistance as it will not trip the solenoid and turn on the valve. It will keep the valve locked on once the valve is tripped.
I will be trying out 12V auto bulbs to increase resistance in lieu of the element....(buying a resistor may be easier).
The real problem is that the solenoid stays on when the power to it is cut by the SSR. I have to physically break the circuit and then the solenoid shuts off.
Is the SSR leaking a bit of power?
This project looks like it has potential - the PID reads the alloy temp very nicely and sends and turns the signal on and off at the correct temps - the solenoid gas valve just does not cooperate.