Relógio utilizando circuitos integrados

F

E

B

A

D

C

G

0 14 1 INA INB

0

BCD_7SEG

74LS90D

2 3 R01 R02 R91 R92 ~RBO A B C D ~BI ~LT ~RBI 6 7 1 15 1 10 9 A B C D QA QB QC QD ~BO ~CO ~RBO 13 12 ~BI ~LT ~RBI 3 2 6 7

QA QB QC QD

12 9 8 11

A B C D

OA OB OC OD OE OF OG
A B C D E F G H A B C D E F G H

1

CK

74LS192D

11 ~LOAD 14 CLR 2 5 4 UP DOWN

OA OB OC OD OE OF OG

BCD_7SEG VCC 5V

2

20Ω

H

3 14 1 INA INB 2 3 6 7 R01 R02 R91 R92 QA QB QC QD 12 9 8 11 A B C D ~BI ~LT ~RBI OA OB OC OD OE OF OG

3

BCD_7SEG

74LS90D

A B C D E F G H A B C D E F G H

Cleiton Ferreira dos Santos Mat. 408119660 Engenharia El€trica Eletr•nica Digital II
0
14 1 2 3 6 7 INA INB R01 R02 R91 R92 QA QB QC QD 12 9 8 11

4

4

~RBO A B C D OA OB OC OD OE OF OG

20Ω
CK

74LS90D

~BI ~LT ~RBI

BCD_7SEG

5 6 7 8

5

~RBO

M

0
14 1 2 3 6 7 14 1 2 3 6 7

6

INA INB R01 R02 R91 R92

QA QB QC QD

12 9 8 11

A B C D

BCD_7SEG

~BI ~LT ~RBI

OA OB OC OD OE OF OG

74LS90D
INA INB R01 R02

7

~RBO A B C D QA QB QC QD 12 9 8 11 OA OB OC OD OE OF OG

A B C D E F G H A B C D E F G H

BCD_7SEG
~BI ~LT ~RBI

8

CK

74LS90D

71

R91 R92

~RBO

S

20Ω

0 1 Hz
F E B A D C G