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Sound-Operated Intruder Alarm

Sound-Operated Intruder Alarm

7

8

3

2

6

1

5

4

IC4

NE555

4

8

3

2

6

1

5

IC3

NE555

7

O/P

Vcc

2

3

7

4

6

-

+

IC1

+

10

11

15

IC2

CD4027

16

13

12

8

9

Q

Vcc

K

J

CLK

R

S

GND

+

+

230V AC

50HZ

S1 = ON/OFF

SWITCH

S1

F1

FUSE

SAMP

X1

D1

1N4001

C1

1000μ

25V

R1

33K

R2

1K

C8

0.1μ

C9

0.1μ

C10

0.1μ

R5

470K

R4

10K

VR1

1K

R3

470Ω

RL1(b)

B1, 60W

230V

BULB

T1

BC548

D2

1N4001

R

1K

RL1

LS1

0.5W

SPEAKER

N/O1

C6

100μ

25V

C11

0.1μ

R7

10K

R8

10K

C5

0.01μ

C3

0.01μ

IC1 = CA3140

RL1 = 12V 200Ω, 2C/O RELAY

X1

230V AC PRIMARY

TO 12V, 250mA

SECONDARY

TRANSFORMER

COND.

MIC

R6

470K

N/C1

N/O2

N/C2

RL1(a)

C7

10μ

25V

C4

0.1μ

Sound-Operated Intruder Alarm

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0
0
publish time: 2020-09-28
Circuit Everyday

When this anti-theft alarm detects any sound, such as the sound of opening the door or the sound of inserting a key, the locked key starts to flash and an intermittent sound alarm is issued.

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