This is an enclosure for a 20Keypad/Numpad/Macropad (call it what you want), that uses QMK firmware and rp2040zero as a microcontroller, fell free to check my page on GitHub for more information.

Seamless 20-Key Layout: Designed to house a 20-key keypad, the enclosure includes a dedicated compartment for the microcontroller, providing a neat and organized setup.

Tool-Free Assembly: The two-part design allows for effortless assembly without the need for tools or screws. The cover conveniently pops into place, offering a secure fit.

Support-Free Printing: Engineered for simplicity, the enclosure requires no support material during printing, making it a hassle-free addition to your 3D printing projects.

Accessibility and Open Source: The design will be available on the Printables website, while the software and detailed instructions can be found on GitHub. on my page or qmk-firmware.

If you are interested in making your own 20Key Macropad, but don't have any experience with programming, the firmware and detailed instructions will be available on my GitHub within the project repository. Or directly here.

The total cost of building this Macropad could be around 10$.

The exact component that I've used:

• MicroController: rp2040zero.
• Diodes:1N4148.
• Keycaps: Black and white keycaps.
• Switches: Red Switches.