4017 CMOS Decade Counter

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The CD 4017 is called a COUNTER or DIVIDER or DECADE COUNTER. It is a very handy chip for producing "Running LED effects" etc.
It has 10 outputs. For normal operation, the clock enable and reset should be at ground.
Output "0" goes HIGH on the rise of the first clock cycle.
On the rise of the second clock cycle, output "0" goes LOW and output "1" goes HIGH. This process continues across the ten outputs and cycles to output "0" on the eleventh cycle.
The "Carry Out" pin goes LOW when output "5" goes HIGH and goes HIGH when output "0" goes HIGH.
In other words, "Carry Out" is HIGH for outputs 0, 1, 2, 3 and 4. It is LOW when the following outputs are active: 5, 6, 7, 8 and 9.
When RESET (pin 15) is taken HIGH, the chip will make output "0" go HIGH and remain HIGH.
When "Clock Inhibit" (pin 13) is taken HIGH, the counter will FREEZE on the output that is currently HIGH.

The clock signal must have a rise time faster than 5μsecs (VDD=15v).

6 LEDs on the KITT SCANNER scan back and forth similar to the lights on the front of the KITT car in the knight rider movie.

4017 LED Knight Rider Running Light Circuit Diagram using NE555

PARTS LIST
 R1                 22kΩ
 R2                 220Ω
 VR1              50kΩ PRESET
 C1                 1µF 16V
 C2                 0.01µF (103)
 C3                 10µF 16V
 D1 – D10      1N4148
 D11 – D16    LED
 IC1                NE555
 IC2                CD4017

In this  4017 Knight Rider circuit, the 555 is wired as an oscillator. It can be adjusted to give the desired speed for the display. The output of the 555 is directly connected to the input of a Johnson Counter (CD 4017).