Introduction: Running Light Chaser Circuit

Picture of Running Light Chaser Circuit

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This running light chaser circuit consist of IC555 timer and IC4017 decade counter, This IC CD4017 drives upto 10 LEDs. Speed of glowing LED can be controlled by variable resistor in timer (IC 555) which is setting frequency output of timing pulse.

Step 1: Circuit Diagram

Picture of Circuit Diagram

This circuit has three stages, the first one is pulse generator here we use timer (IC555) circuit to produce astable pulses. The second stage is decade counter (CD4017) this will count the astable pulse in a circle pattern. Final section is output LEDs, here we can connect different colour LEDs to make the output beautiful.

Step 2: Components List

Picture of Components List


1. IC 555 and IC CD4017 each 1
2. LED 8

3. Resistor 220Ω 8
Resistor 10KΩ 1
Variable Resistor 100KΩ 1

4. Capacitor 10uF 1
Capacitor 0.01uF 1

Step 3:

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JRV31 made it! (author)2015-12-04

Very nice project. One thing you should be aware of, when the output pin (3) goes low the discharge pin (7) is shorted directly to ground. It is a good idea to have a resistor in series with your pot to prevent damage to your 555.

I used two 4.7K resistors. It blinks all eight LEDs in about one second.

theorycircuit (author)JRV312015-12-07

Thank you for your suggestion :-)

DIY Hacks and How Tos (author)2015-10-24

Great basic electronics project.

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