Hi I need help on this schematic, the aim is to control a water pump (max 35W of load) which has to be shut off when the water level goes low.
I searched for some floating switches but they are DC and low voltage (being in contact with water that makes sense).
I've come up with the schematic I attach, I have a triac which is piloted by a gate which controls the 230Vac terminals A1 and A2, on the other side I have a low voltage DC line (9v most likely) separated by a photo-coupler so that 230Vac don't get in contact with water.
I need help on the choice of the R1 resistance so as not to burn the gate of the triac and the suggested models for the photo-coupler and triac.
If you could tell me how to come up with the right resistance values I would be grateful.
Thank you
I searched for some floating switches but they are DC and low voltage (being in contact with water that makes sense).
I've come up with the schematic I attach, I have a triac which is piloted by a gate which controls the 230Vac terminals A1 and A2, on the other side I have a low voltage DC line (9v most likely) separated by a photo-coupler so that 230Vac don't get in contact with water.
I need help on the choice of the R1 resistance so as not to burn the gate of the triac and the suggested models for the photo-coupler and triac.
If you could tell me how to come up with the right resistance values I would be grateful.
Thank you
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