Automatic water tank level controller motor driver circuit. Jan 16, · BLURED( 101S) Automatic WaterTank Overflow Control & Pump OFF System. Here is a simple, automatic water- level controller for overhead tanks that switches on/ off the pump motor when water in the tank goes below/ above the minimum/ maximum level. So current through R5 and D1 to trigger base of Q3, cause Q3 conducts current to cause the transistor Q4 also works.
It could automatically switch ON and OFF of the domestic water pump set based on the water level of the tank. The explained IC 555 based Automatic water level control circuit is a straightforward approach, project. Let us consider two reference probes ‘ A’ and ‘ B’ inside the tank, where ‘ A’ is the lower- limit probe and ‘ B’ is the upper- limit probe. The approximated cost of the project is about $ 5 only. The water level is sensed by two floats to operate the switches for controlling the pump motor. You are able to utilize this motor driver circuit at your home or college employing more affordable components. So current through R5 and D1 to trigger base of Q3, cause. Figure 1 Simple automatic water level controller circuit.