30S倒计时器电路图

2022-06-18 17:10:15 文档大全网 [ 字体：小中大 ] [ 阅读： ]

【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《30S倒计时器电路图》，欢迎阅读！
倒计时器,电路图,30S
U8C

U8A

&

VCC

5V

&

U10

1213

5437126

~EL~BI~LT

BCD/7SEGDADBDCDD

OAOBOCODOEOFOG

1312111091514

CA

U5

CA

U6

74LS00D

74LS00D

X2

141154

CLRU1~CO~LOADUPDOWNABCD

~BO

U8B

&

ABCDEFGABCDEFG

74LS00D

SPDT_OPEN

151

QAQBQCQD

3267

X3

SPDT_OPEN

109

VCC

5V

74LS192D

4511BD_5V

543

U11

VCC

5V

U2

U4D

&

14115415

CLR~LOADUPDOWNABCD

~CO~BO

1213

~EL~BI~LT

BCD/7SEGDADBDCDD

OAOBOCODOEOFOG

1312111091514

712

74LS08D

R1

20k

476

RSTDISTHRTRICON

8VCC

OUT

U7

3

X1

QAQBQCQD

3267

6

1109

SPST_OPEN

74LS192D4511BD_5V

R2

62k

25

LM555CM

U3

U9

BUZZER200 Hz

GND

>=1

C1C2

1

LED1

R3

4078BD_5V

390

10nF

10uF-POL

30S倒计时器