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Course material Special Digitale Elektronik 14 years and over
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Fig. 61:
Synchronous
forward counter
Again, four
LEDs are to be
lit indivi
dually in se
quence. All in all,
a light
pattern forms that l
ooks as if a dot circ
led counter
-
clockwise.
Output Q2
Output Q1
Numeric
value
LED 1
LED 2
LED 3
LED 4
0
0
0
1
0
0
0
0
1
1
0
1
0
0
1
0
2
0
0
1
0
1
1
3
0
0
0
1
1
...
...
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