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Another Water Pump Controller circuit

Another Water Pump Controller circuit

2

4

3

6

5

Vcc

8

GND

IC1

555

1

R

OUTPUT

PUMP

L

H

+12V

230V AC

50HZ

GND

T1

BC547

RL1

12V, 1C/O

RELAY

D1

1N4007

R5

10K

R6

100K

R2

10K

R1

10K

WATER TANK

SENSORS

C1

0.01μ

R4

1M

R3

1M

N

P

N/O

N/C

Another Water Pump Controller circuit

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publish time: 2020-09-22
Kiraaaa

The water pump controller senses the water level in the water tank and drives the water pump. The circuit described here is built around timer IC1 (555). When the water tank level is lower than the low level marked "L", the voltage of IC1 pin 2 becomes low. The internal SR flip-flop of IC1 is reset and its output becomes high. This high output pin 3 of IC1 drives the relay driver transistor T1 (BC547) and powers the relay RL1. The water pump gets power through the n/o contact of the relay and turns on the power to start filling the water tank.

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