4017 LED Knight Rider Circuit Diagram

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led knight rider circuit using 4017 and 555 ic's

4017 LED Knight Rider Running Light Circuit Diagram

In this  4017 Knight Rider circuit diagram, the 555 uses as an oscillator. It can adjust to give the desired speed for the display. Because the output of the 555 is directly connect to the input of a Johnson Counter (CD 4017).

led knight rider circuit diagram using 4017 and 555 ic's

PARTS LIST
R122kΩ
R2220Ω
VR150kΩ PRESET
C11µF 16V
C20.01µF (103)
C310µF 16V
D1 – D101N4148
D11 – D16LED
IC1NE555
IC2CD4017

The input of the counter is called the CLOCK line. The 10 outputs become active, one at a time, on the rising edge of the waveform from the 555. Each output can deliver about 20mA but a LED should not be connect to the output without a current-limiting resistor (220Ω in the circuit above).

CD4017 pinout and description

CD4017 Counter Divider pin Configuration 4017
The CD4017 is a 5-stage divide-by-10 Johnson counter with 10 decode outputs and a carry out bit. These counters clear to their zero count by a logical ‘‘1’’ on their reset line. The 10 decoded outputs are normally in the logical ‘‘0’’ state and go to the logical ‘‘1’’ state only at their respective time slot. Each decoded output remains high for 1 full clock cycle. The carry-out signal completes a full cycle for every 10 clock input cycles and use as a ripple carry signal to any succeeding stages.

The first 6 outputs of the chip connect directly to the 6 LEDs and these “move” across the display. The next 4 outputs move the effect in the opposite direction and the cycle repeats. The animation above shows how the effect appears on the display.

Also using six LEDs, the display can be placed in the front of a model car to give a very realistic effect.

The outputs can be taken to driver transistors to produce a larger version of the display.

led knight rider circuit diagram4017 led knight rider circuit

4017 LED Knight Rider Circuit Video

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Comments (16)

  1. Hi Great project . but where dose pin 3 go from 555 timer to 4017 ? and GND from 4017 all so how do i add more than 6 leds ? thx

    Reply

  3. Ant :
    Hi Great project . but where dose pin 3 go from 555 timer to 4017 ? and GND from 4017 all so how do i add more than 6 leds ? thx

    Reply

  6. 3rd Pin will go to 14th Pin of 4017IC.. & 8, 13, 15 PIN will be shorted…. You have to give power Supply on 16th PIN… Hope your problem is solved.!!

    Reply

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