用8,4,2,1输入0电平,可以显示0,1,2,3,4,5,6,7,8,9,A,b,C,d,E.F,
是cd4511无法做到的.
P16V8R
+---------\ /---------+
| \ / |
| ----- |
| 1 20 | Vcc
| |
D8 | 2 19 | g
| |
D4 | 3 18 | f
| |
D2 | 4 17 | e
| |
D1 | 5 16 | d
| |
| 6 15 | c
| |
| 7 14 | b
| |
| 8 13 | a
| |
| 9 12 |
| |
GND | 10 11 |
| |
| |
`---------------------------'
7BCD.rar
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