How To Make Automatic Water Pump Controller (Transistor Based)

 Hello,and welcome back to Enghme for a new electronics project.In this tutorial, we are making an automatic water pump controller  project. This circuit is a low-cost version of the automatic water pump controller. It uses only a few transistors, a relay, a transformer, a BT139 TRIAC, and some other discreet components. Since all these components are universal and cheap, this is the reason for the low cost of the entire project. The purpose of this circuit is to control any liquid or water pump according to the required upper and lower liquid levels or containers or tanks. The circuit is completely automatic. 

 Hardware Required:

1-Step-down transformer
2-Bridge rectifier    
7-Pump motor    
8-TRIAC  and Resistor

Circuit Diagram


The transformer will reduce the 230V supply voltage to 9 or 12V to the circuit. This voltage will be converted into a DC voltage by a bridge rectifier, and then filtered by an electrolytic capacitor. The input signal is now ready to be used in the circuit and will activate the transistor. This will activate the relay and LED. A pump motor is connected, so when the water reaches the sensor B level, the circuit will turn on the motor. You can also run this voltage with a 5-6V power supply or transformer. The relay should have the same value as the operating voltage.

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