Water Level Controller Datailed

WATER LEVEL CONTROLLER BATCH 3 ANU T K AYYAPPADAS C NITHIN RAJ SREERAG S TIRUVARP

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This circuit switches “on” the motor pump when water in the overhead tank falls below the lowest level and turns it “off" when the tank is full.

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If , the pump is running dry it sounds an alarm to alert to switch off the motor.

Ic 7812

Ic 555

Water at lower level: • All electrodes are separated • Output of Ic (pin 3) goes low • T1 cut off,T2 on and energises relay Water at upper level: • Electrode E3 touches E2 • Output of Ic (pin 3) goes high • T1 on,T2 off and de-energises relay

Motor runs dry: • Electrode A and B separated • T3 cut off,T4 turn on and activates the buzzer

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FEATURES Simple and Economical Turns on the motor when water level is below the lowest level Turns off the motor when the tank is full Manual on/off of motor is possible Indicates status of motor If the motor runs dry , it sounds alarm to switch off the motor

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APPLICATIONS House hold applications in water tank Protection of motor against running dry Prevents the water loss due to over flow