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Wire-Break Alarm With Delay

Wire-Break Alarm With Delay

16

11

3

IC1

CD4060

9

10

8

O13

12

C1

0.01μ

C2

0.22μ

R3

2.2K

R2

2.2M

VR1

4.7K

R1

1.2M

R4

10K

T1

BC547

LED1

R5

680Ω

PZ1

PIEZO

BUZZER

THIN WIRE LOOP

ACROSS DOOR

9-12

VOLTS

R6

2.2K

T2

SL100

Wire-Break Alarm With Delay

3
0
0
publish time: 2020-09-29
Circuit Everyday

This is a simple disconnection alarm circuit that will automatically activate and block the exit after a delay of 15 to 30 seconds. When the thin wire loop of the entrance door is broken, the alarm sounds for 15 to 30 seconds (the time period set by VR1). Therefore, the crew has enough time to catch the thief.

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