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Automatic Water Pump Controller

Automatic Water Pump Controller

N3

13

12

11

14

N2

5

6

4

N1

1

2

3

7

R1

1K

M

C

+12V

A

LOWER

LIMIT

B

UPPER

LIMIT

INSULATOR

WATER TANK

T1

BC547

D1

1N4001

IC1 (N1-N3) = CD4011

RL1-RL2 = 12V, 200Ω 1C/O RELAY

T3

BC547

R4

1K

D2

1N4001

RL2

GND

230V AC

50HZ

N

L

R3

1K

R2

1K

T2

BC547

RL1

N/O

N/C

N/O

N/C

+12V

Automatic Water Pump Controller

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0
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publish time: 2020-09-24
Circuit Everyday

This is a circuit that automatically controls the pump motor. The motor will automatically turn on when the water in the overhead tank (OHT) drops below the lower limit. Likewise, it closes when the water tank is full. Built around only one NAND gate IC (CD4011), the circuit is simple, compact and economical.

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