Water Level Controller
Water Level Controller
Water Level Controller
This circuit can stop the working of water pump when the overhead tank
is full. Relay connected to the circuit triggers and breaks the power to the
water pump.
WATER LEVEL CONTROLLER ESK 70
The circuit uses the CMOS IC CD 4001 to drive the relay. When the probe This circuit can stop the working of water pump when the overhead tank
A connected to the inputs of gate 1 of IC is floating, output of IC1 remains is full. Relay connected to the circuit triggers and breaks the power to the
low and the transistor T1 remains non conducting. Water pump then gets water pump.
power through the common and NC contacts of the relay. When the water
level rises, probe A and B gets electrical continuity and the output of IC1 The circuit uses the CMOS IC CD 4001 to drive the relay. When the probe
turns high and activates the relay. The breaks the power to the pump. A connected to the inputs of gate 1 of IC is floating, output of IC1 remains
low and the transistor T1 remains non conducting. Water pump then gets
power through the common and NC contacts of the relay. When the water
level rises, probe A and B gets electrical continuity and the output of IC1
R3 C
R1 100R turns high and activates the relay. The breaks the power to the pump.
10K Buzzer / Relay
14 3 +
D
1 D1 9V
5 D2
IC1 LED IN4007 R3 C
CD 4001 Red R1 100R
2 6
A 10K Buzzer / Relay
14 3 +
Probes D
1 D1 9V
B 5 D2
T1 LED
4 IC1 IN4007
7 R2 BC547 CD 4001 Red
2 6
1K A
Probes
ESK 70
B
T1
4
7 R2 BC547
1K
Note : When the probes are free, circuit becomes active. LED and relay ESK 70
turns on. When water makes contat with the probes, relay turns off.