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Smart Loop Burglar Alarm

Smart Loop Burglar Alarm

2

3

4

1

-

+

IC1A

LM324

6

5

11

7

-

+

IC1B

LM324

EXTERNAL

ALARM

DEVICE

+12V

R1

10K

R2

10K

R3

10K

R4

8.2K

R5

12K

R

10K

X

R7

10K

T1

2N2222

T2

2N2222

RESET

S1

PUSH

TO OFF

SWITCH

ALARM

POWER

SUPPLY

RL1

D1

1N4001

R6

10K

N/O

N/C

Y

12V,

2C/O

RELAY


Smart Loop Burglar Alarm

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publish time: 2020-09-29
Circuit Everyday

As long as the cycle is interrupted, an anti-theft alarm will sound. But what if there is a thief who understands this principle? Usually, the operation of the thief may be to shorten the loop conductor by using some other tools, thereby cutting off the short-circuited part of the loop. Here is the circuit of the smart loop anti-theft alarm, which overcomes this shortcoming by using the inductor, which is the resistance (R) in the loop.

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