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Mains Box Heat Monitor

Mains Box Heat Monitor

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Output

THR

T

7

4

3

6

2

1

R

DIS

5

Vcc

8

GND

IC1

NE555

220V AC

50HZ

X1

230V

AC Primary to 0-9V

500mA, Secondary

Transformer

C1

100UF

25V

LED1

D5

1N34

D1

D2

D3

D4

D1-D4 = 1N4007

T1

BC548

R2

100K

R1

100

Ohm

VR1

1M

R3

1K

R5

4K5

R2

100K

Power

Sensor

C2

0.01UF

LED2

RED

R6

200

Ohm

PZ1

Piezo

Buzzer

LED3

R8

470

Ohm

R9

150

Ohm

T2

BC558

R7

47

Ohm

0.5W

D6

1N4001

9V

Re-

Chargeable Battery

White

S1
ON/OFF

Switch

Mains Box Heat Monitor

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publish time: 2020-09-17
Circuit Everyday

This simple circuit constantly monitors the main distribution box and issues an alarm when it is running. It can sense the high temperature caused by overheating and help prevent any disasters caused by sparks. Due to a short circuit in the power supply box. It also automatically switches a bright white LED etc. The LED provides ample light to check the wires or fuses of the power box in the dark. There will be a beep when the circuit is powered off, and beep when the power supply is restored.

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