HardLabs

SimpleKeypad

ALLS-0227·SimpleKeypad·PCB/SimpleKeypad.kicad_pcb

SimpleKeypad PCB layout, top view — open source RP2040/RP2350 board by ALLS-0227

About the SimpleKeypad PCB

SimpleKeypad is an open source RP2040/RP2350 PCB design by ALLS-0227, published on GitHub. It is a 2-layer board measuring 41.9 × 63.3 mm, with 7 components from 3 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 4 switches, 2 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

Designing a mini keyboard as a first hardware project. This repository includes the board layout of the PCB and the schematic, as well as the STL files of the case and lid.

Designing a mini keyboard as a first hardware project, which will allow you to communicate in morse code with just 4 keys.

STL/STP/f3z files of the assembly, lid, case and imported models.

Consists of 2 separate printed pieces. The bottom part, where the PCB sits, and the top cover, which allows the keys to be placed. Made in Fusion360 by Ángel Leonardo LS

SimpleKeypad, from the project README
From the project README

Main components on the SimpleKeypad

XIAO-RP2040-DIP

SimpleKeypad bill of materials (BOM)

7 components, 3 distinct parts.

QtyPartRefs
1
XIAO-RP2040-DIP
U1
4
SW_Push
SW1, SW2, SW3, SW4
2
SK6812MINI
D1, D2

SimpleKeypad design files

The KiCad project lives in the ALLS-0227/SimpleKeypad repository on GitHub; these links point at the commit this page was built from.

SimpleKeypad: common questions

What microcontroller does the SimpleKeypad use?

The SimpleKeypad is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the SimpleKeypad PCB?

The SimpleKeypad measures 41.9 × 63.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SimpleKeypad?

7 components, from 3 distinct parts. The full bill of materials is listed on this page.

Where can I download the SimpleKeypad design files?

From the ALLS-0227/SimpleKeypad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SimpleKeypad design in my own project?

The repository has no license, so all rights stay with ALLS-0227. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the SimpleKeypad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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