How to make a DIY LED Chaser Circuit Using CD4017 & NE555 | No Microcontroller Needed!

Hello and welcome back! In this project, we will learn how to make an LED chaser without using a microcontroller. For that, I used a CD4017 Decade Counter IC and an NE555 Timer IC. The NE555 Timer IC generates pulses, which we can get from pin 3. The CD4017 IC provides 10 outputs, allowing us to create the LED chasing effect. Additionally, I have included a 100k (104) preset to control the speed of the LED chaser. By adjusting this preset, we can change the pulse output speed. Also, this circuit can be powered with a 5V to 9V power supply. To simplify the assembly of this circuit, I have also designed a PCB with JLCPCB for this project. Finally, I want to say that this project is a great way to learn about basic electronics, IC functionality, and circuit design.

Ok, let’s do this project step by step. The required components are given below.

CD4017 IC x 1 — Our store / Amazon

NE555 Timer IC x 1 — Our store / Amazon
16 Pin IC base x 1 — Our store / Amazon
8 Pin IC socket x 1 — Our store / Amazon

10uf Capacitor x 2 — Our store / Amazon
1.5k Resistor x 2 — Our Store / Amazon
100-ohm Resistor x 2 — Our Store / Amazon

5mm white LED x 2 — Our store / Amazon
Two-pin terminal x 2 — Our store / Amazon
104 Preset x 1 — Our store / Amazon

Disclosure: These Amazon links are Affiliate links. As an Amazon Associate, I earn from qualifying purchases.

Step 1

First, identify these components.

Step 2

Secondly, let’s order PCBs for this project. To do that, follow the instructions below.

First, go to the JLCPCB official website and log in to your account. If you are a new customer, please use my link here to register and claim $60 in new user coupons.

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Click the “Instant Quote” button and upload the Gerber file, which you can download from the link below.
Gerber file – Download

For this project, I ordered five green PCBs. Next, select the build time and shipping method. Finally, click “Save to Cart” and complete the payment.

Step 3

Thirdly, unbox your PCB package once you receive it.

Step 4

Next, solder the components one by one.

Step 5

Afterward, connect the CD4017 IC and NE555 IC to their respective IC bases.

Step 6

Finally, connect the 5V – 9V power supply to the circuit. Now, you can adjust the speed of the LED chaser using the preset. Okay, enjoy this project! The full video guide is below. We hope to see you in the next project. Have a great day!