Knightrider lights for model cars
This simple circuit drives 6 LEDs in 'Knightriderscanner 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 VDDand 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 | VDD | 8 | GND | 16 | VDD |
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