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Hum-Sensitive Touch Alarm

Hum-Sensitive Touch Alarm

2

3

7

4

6

-

+

IC1

741

2

3

7

4

6

-

+

IC2

CA3140

+

SHELDED

WIRE

R2

47K

C1

0.1μ

TOUCH

PLATE

R3

15K

R4

15K

R5

1M

R1

56K

VR1

10M

PRESET

C2

100μ

25V

D1

1N4148

R7

120K

R6

3.3K

R9

10K

T1

BC547

PZ1

PIEZO-

BUZZER

+12V

R8

1K

LED1

GND

Hum-Sensitive Touch Alarm

0
0
0
publish time: 2020-09-22
Kiraaaa

Both the radiation signal from the power cord and the electromagnetic field in the human body can travel a distance of several meters.

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