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Visit our eBay store for more electronic products.Learn the fundamentals of electronic timing and digital counting with this NE555 + CD4017 SMD LED Chaser DIY Kit. This compact DIY electronics project combines the popular NE555 timer IC with the CD4017 decade counter to create a continuously running LED light sequence.
The kit is an excellent choice for electronics enthusiasts, students, beginners and makers who want practical experience with SMD soldering, oscillator circuits, counters and LED control.
The circuit uses two important ICs:
NE555 Timer
The NE555 operates as an astable oscillator and generates a continuous series of clock pulses. The oscillation speed determines how quickly the LEDs change.
CD4017 Decade Counter
The CD4017 receives the clock pulses from the NE555 and sequentially activates its outputs. LEDs connected to these outputs therefore illuminate one after another, producing a classic running/chasing light effect.
NE555 → Clock Pulses → CD4017 → Sequential LED Output
Classic NE555 + CD4017 circuit design
SMD-based DIY electronics kit
Creates an attractive LED running/chaser effect
Excellent project for learning basic electronics
Provides hands-on SMD soldering practice
Demonstrates timer and oscillator principles
Demonstrates decade counter operation
Compact PCB design
Suitable for hobbyists, students and electronics beginners
Great educational and STEM project
Can be used as an introduction to practical PCB assembly
This kit provides practical experience with several fundamental electronics concepts, including:
555 timer circuits
Astable oscillators
Clock pulse generation
Decade counters
Sequential logic
LED driving
Resistor and capacitor timing networks
SMD component identification and soldering
Basic PCB assembly and troubleshooting
It is a much more interesting learning project than simply assembling a static LED circuit because you can immediately see the result of the circuit operating.
The timing section controls the rate at which the CD4017 advances through its outputs. Depending on the specific kit version, the timing components can be adjusted to change the LED chasing speed, allowing you to experiment with different running-light effects.
This DIY kit is ideal for:
Electronics beginners
Students
STEM and school projects
SMD soldering practice
Electronics training
Hobby electronics
DIY LED projects
Arduino and microcontroller learning preparation
Makers and experimenters
Classroom demonstrations
Gifts for electronics enthusiasts
The small PCB makes this project easy to assemble and suitable for experimenting with electronic circuits without requiring a large work area. Once assembled, it can also be used as a demonstration board for explaining how a 555 timer and decade counter work together.
This is a DIY soldering kit. The components need to be soldered onto the PCB before the circuit can be used.
Basic soldering equipment and suitable tools are required.
Because this is an SMD kit, it is particularly useful for anyone wanting to practice working with surface-mount components.
1 × NE555 + CD4017 SMD LED Chaser DIY Kit
PCB
Electronic components required for assembly
This is a DIY electronics kit and requires assembly. It is not a ready-to-use assembled circuit.
The exact component values, PCB layout and LED quantity may vary depending on the kit version. Please refer to the supplied PCB markings/components when assembling the kit.
From generating clock pulses with the NE555 to counting those pulses with the CD4017, this kit demonstrates several important electronics principles in one simple and visually engaging project.
Solder it. Power it. Watch the LEDs chase. Learn how the circuit works!