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Touch Alarm

Touch Alarm

GND

IC1

CD4060

CEXT

VDD

Q3

Q4

Q5

7

Q6

Q7

Q8

Q9

Q11

Q12

Q13

5

4

6

14

13

15

1

2

3

REXT

RS

MR

16

12

11

9

10

8

7

2

1

IC2

NE555

6

4

3

5

8

+

+

+

TP1

C2

0.1μ

C1

1n

L1

100uH

P1

TOUCH PLATE

TP0

GND

C4

0.01μ

C3

0.0μ

TP2

C5

2.2μ

25V

T2

BC547

R3

4.7K

R4

22K

C7

0.047μ

C8

0.01μ

LS1

8-OHM

0.5W

C9

47μ, 25V

CON1

12V

DC INPUT

C6

100μ

25V

TP4

R6

1K

R5

4.7K

T1

BC557

R1

100K

TP3

R2

120E

R7

56K

Touch Alarm

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publish time: 2020-09-28
Circuit Everyday

Touch the alarm sensor with your finger, a beep will sound, and it will stop after a period of time. The same operation is applied when touching again. This small and flexible circuit includes a touch sensor and a directly coupled transistor amplifier with a speaker as an output load.

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