An Automatic Wireless Water Pump Controller

The Automatic Wireless Water Pump Controller operates by using low-voltage DC sensing probes placed inside an overhead water tank to monitor fluid levels without exposing the user to mains electricity. When water drops below a critical threshold, the state change is processed by a CD4001 quad NOR gate integrated circuit configured to manage the logic states. Instead of running long physical control lines across a property, the system encodes this logic state and transmits it wirelessly using inexpensive 433MHz RF modules. On the receiving end, the paired RF module decodes the wireless transmission, activating a transistor switch that supplies current to drive an electromechanical relay. This relay acts as a heavy-duty electronic switch, opening or closing the high-voltage circuit connected to the water pump motor. The entire circuit is organized and interconnected on a professionally designed custom PCB, utilizing screw terminals for secure and reliable wire management.