Ondrak123 (Ondřej K.)

CZECH REPUBLIC, THE • + Follow

Engineer

INDIA
- 0
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1

Components

	NE555 Texas Instruments	x 1
	CD4017BE Texas Instruments	x 1

Tools, APP Software Used etc.

	KiCad 9.0
	Soldering iron (generic)
	Soldering Iron Wire

Description

Led Chaser, Mostly SMD, using NE555 & CD4017

NE555 & CD4017 LED CHASER

-The LEDS, RESISTORS AND INTEGRATED CIRCUITS are all SMD, therefore there are 3mm TH Leds, TH Potentiomer and TH 1*2 Pinheader.

-All files such as BOM, CENTROID, GERBERS, LAYOUT and SCHEMATIC is included.

-Input 5-9V DC.

HOW DOES THIS CIRCUIT WORK:

-The NE555 is configured as an astable multivibrator, generating continuous clock pulses that drive the CD4017. Each pulse from the 555 advances the CD4017’s output, turning on one LED at a time in sequence. Once all 10 outputs are used, the CD4017 automatically resets and starts again, creating a smooth running-light or chasing effect. The chase speed can be adjusted by changing potentiomer connected to the NE555.

Schematic and Layout

Schematic

Snímek obrazovky 2025-10-27 160718.png

Layout

Snímek obrazovky 2025-10-27 163053.png

Download Gerbers Download BOM(Bill of materials)

Oct 27,2025

1,360 views

Led Chaser, Mostly SMD, using NE555 & CD4017

This LED Chaser is all SMD, only thing that is not is the power supply input, potentiometer and the leds. EXPLANATION INCLUDED. All files.

1360

Published: Oct 27,2025

Standard PCB

Download Gerber file 22

BOM(Bill of materials)

Centroid file

PCBWay Donate 10% cost To Author

Only PCB

PCB+Assembly

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Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
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