This water level indicator project has a very simple circuit consisting of 3 probes which are used for automatic fill and cut of the water supply in tank. These are GROUND, HIGH and LOW. The GROUND probe is used for the reference.
As the water level touches the HIGH level probe, the pump must stop and should not start until the level of water reaches the low level probe. The circuit requires working at 12V battery or 230V AC mains using a 12V adaptor.
Filed Under: 555 Timers, Electronic Projects