Knightrider lights for model cars

Knightrider lights for model cars

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This simple circuit drives 6 LEDs in 'Knightrider scanner mode'. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version).

Here's the circuit:

Note that V DD and GND for the ICs are not shown in the circuit drawing.

Pin-outs:
(7)555 4017
1 GND 1 Q5 9 Q8
2 TRIGGER 2 Q1 10 Q4
3 OUTPUT 3 Q0 11 Q9
4 RESET 4 Q2 12 CO
5 CONTROL VOLTAGE 5 Q6 13 NOT ENABLE
6 THRESHOLD 6 Q7 14 CLK
7 DISCHARGE 7 Q3 15 RESET
8 V DD 8 GND 16 V DD

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