guindilla
Well-Known Member
Cheers,
I am designing a PID based on Arduino for an electric brewing system.
I will use the 5V circuit Arduino provides to trigger an SSR that will let high-voltage (230V as I'm in Europe) go through to a water heater resistance or water pump.
I want to put a switch to ensure that the heater or water pump can get disconnected, overriding the PID. I have a doubt about where to include this switch though.
I can put a 12V switch to cut the 5V Arduino circuit that will enable the SSR, thus ensuring that the SSR is off when the switch cuts the circuit.
Or I can put a 240V/15A switch after the SSR, so even if the Arduino activates the 5V circuit, the 230V circuit will be interrupted by the switch when required.
Bonus questions: I guess it should be OK and safe to use a 12V switch in my 5V circuit, as well as using a 240V 15A on my 230V to drive 13-14A of current. Is that right?
Thanks a lot.
I am designing a PID based on Arduino for an electric brewing system.
I will use the 5V circuit Arduino provides to trigger an SSR that will let high-voltage (230V as I'm in Europe) go through to a water heater resistance or water pump.
I want to put a switch to ensure that the heater or water pump can get disconnected, overriding the PID. I have a doubt about where to include this switch though.
I can put a 12V switch to cut the 5V Arduino circuit that will enable the SSR, thus ensuring that the SSR is off when the switch cuts the circuit.
Or I can put a 240V/15A switch after the SSR, so even if the Arduino activates the 5V circuit, the 230V circuit will be interrupted by the switch when required.
Bonus questions: I guess it should be OK and safe to use a 12V switch in my 5V circuit, as well as using a 240V 15A on my 230V to drive 13-14A of current. Is that right?
Thanks a lot.