I am working on this simple smart farm project. It's quite straightforward. Just a bunch of nodeMCUs gathering data from sensors, sending it to Firebase and visualizing these data remotely using a desktop application.
Now, my boss wants to add automation to the sprinkler system. Basically, we have three water pumps that he wants to remotely control. Now, I am not an electrical expert so I need help with setting this up.
These are the water pump that needs to be controlled and the relay I am planning to use to control the water pumps.
You need to find the controller box for those pumps and control the control box with your Arduino relay. But make sure you can easily and quickly replace a failed relay, because they will fail without much use.
Those pumps are three wire units. One direct, one through a phasing capacitor and one return. The control box has the contactor to starting the pump and the phasing capacitor.
Remember, you are replacing a mechanical relay that controls the pump controlling contactor!!!! You only need around one Amp. Likely a heat sink is not needed. Please find the pump controller and it's specifications.
