1

2

3

4

5

6

7

8

1

0

1

2

1

2

3

1

2

M

E

G

A

8

-P

7805

470uF

UNL2003AN

10uH

1

0

0

n

F

10uF

1

0

0

n

F

330R

330R

330R

330R

330R

BC547

1k

3

3

p

F

3

3

p

F

100nF

G

5

L

1N4004

BC337

1

0

k

1

0

k

1

0

0

n

F

1

k

1k

10k

P

O

R

T

C

0

1

2

3

4

5

6

P

O

R

T

B

0

1

2

3

4

5

6

7

P

O

R

T

D

7

6

5

4

3

2

1

0

BUZZER

S1

S2

S3

S4

TACT SWITCH

R

E

L

A

Y

L

E

D

 

R

E

S

E

T

POWER

12V 5V

CRYSTAL

A

R

E

F

REZ TC

P UNL

IS

P

G

N

D

VCC

+

NO

NC

BZ1

1

2

3

4

5

LED1

LED2

LED3

LED4

LED5

REZ

REZ

LED

10uF

TEST BOARD

ATMEGA8

7654321