I made a custom keyboard using 3D printing, a custom PCB, and an ESP WROOM 32.

It’s a 40% layout keyboard with 42 keys.

There’s a full build video below — if you’re interested, feel free to follow along and make your own!

🔻🔻 Materials Needed 🔻🔻

1. Heat Insert Soldering Iron (HS-02): [https://s.click.aliexpress.com/e/_c4UM9WcX](https://s.click.aliexpress.com/e/_c4UM9WcX)

    Discount Code: FNRSB278 (for orders over $45)

2. ESP WROOM 32 (Wi-Fi + Bluetooth Dual Mode): [https://s.click.aliexpress.com/e/_c4peKpXt](https://s.click.aliexpress.com/e/_c4peKpXt)
3. Cherry MX Switches: [https://s.click.aliexpress.com/e/_c3NZYG2T](https://s.click.aliexpress.com/e/_c3NZYG2T)
4. Slide Switch: [https://s.click.aliexpress.com/e/_c3bxRjgx](https://s.click.aliexpress.com/e/_c3bxRjgx)
5. Lithium Battery Charging Module: [https://s.click.aliexpress.com/e/_c4W6GSgr](https://s.click.aliexpress.com/e/_c4W6GSgr)
6. Keycaps: [https://s.click.aliexpress.com/e/_c396Vb9H](https://s.click.aliexpress.com/e/_c396Vb9H)
7. Diode (1N4148): [https://s.click.aliexpress.com/e/_c3pWguST](https://s.click.aliexpress.com/e/_c3pWguST)
8. Li-Polymer Battery: [https://link.coupang.com/a/cGDScH](https://link.coupang.com/a/cGDScH)
9. Stabilizers: [https://s.click.aliexpress.com/e/_okUCe6f](https://s.click.aliexpress.com/e/_okUCe6f)
10. Molex Connector + Terminals: [https://s.click.aliexpress.com/e/_c4UeB8hZ](https://s.click.aliexpress.com/e/_c4UeB8hZ)
11. 3mm Round LED (optional): [https://s.click.aliexpress.com/e/_c4OT5Ovp](https://s.click.aliexpress.com/e/_c4OT5Ovp)
12. Insert Nuts: [https://ko.aliexpress.com/item/1005007830491580.html?spm=a2g0o.order_list.order_list_main.10.4c72140fIJZyvg&gatewayAdapt=glo2kor](https://ko.aliexpress.com/item/1005007830491580.html?spm=a2g0o.order_list.order_list_main.10.4c72140fIJZyvg&gatewayAdapt=glo2kor)

📣 Download PCB design files and source code:

[https://newtlekim.tistory.com/10](https://newtlekim.tistory.com/10)

Please make sure to watch the following videos first —

They cover some overlapping content that won’t be repeated in this tutorial.

1. ESP32 Wireless Bluetooth Keyboard Basics: [https://www.youtube.com/watch?v=alktrUJ6e7c](https://www.youtube.com/watch?v=alktrUJ6e7c)
2. EasyEDA Installation & Basic Usage: [https://www.youtube.com/watch?v=U1cSzB38JNQ](https://www.youtube.com/watch?v=U1cSzB38JNQ)
3. ESP32 Keypad Build: [https://www.youtube.com/watch?v=4kpL2nGG9Fg](https://www.youtube.com/watch?v=4kpL2nGG9Fg)

🕒 Video 

In this video, I’ll show how to design your own keyboard PCB and order it with just one click.

You’ll also see how to model and print your case in 3D, and I’ll share the source code that makes the keyboard functional.

Just follow along on Newtle Kim’s blog, and you can create your very own wireless Bluetooth keypad.

Every creation begins with imitation — once you follow along, you’ll be able to build your own custom keyboard!

Newtle Kim’s Blog: [https://newtlekim.tistory.com/10](https://newtlekim.tistory.com/10)

⚠️ All files provided in this video are copyrighted by “Newtle Kim.”

Unauthorized copying or commercial use is strictly prohibited.