HardLabs

Keyboard

M0HID·Keyboard·pcb/hackboard.kicad_pcb

Keyboard PCB layout, top view — open source RP2040/RP2350 board by M0HID

About the Keyboard PCB

Keyboard is an open source RP2040/RP2350 PCB design by M0HID, published on GitHub. It is a 2-layer board measuring 309.7 × 117.3 mm, with 254 components from 12 distinct parts.

Its main chip is the MCU_SEEED_XIAO_RP2040, from the RP2040/RP2350 family. Other key parts include the MCP23017_ML. By type, the board carries 168 diodes, 83 switches and 3 ICs.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

This is a 75% keyboard fully designed by me, including the PCB, case, and firmware. It is designed to use KMK, a circuitpython-based firmware for keyboards! I included a rotary encoder, as well as a few "action" keys on the side of the keyboard which can be reprogrammed to anythi

This is a 75% keyboard fully designed by me, including the PCB, case, and firmware. It is designed to use KMK, a circuitpython-based firmware for keyboards! I included a rotary encoder, as well as a few "action" keys on the side of the keyboard which can be reprogrammed to anything you want, such as media controls, text controls, or any kind of shortcut you can think of!

Keyboard, from the project README
From the project README

Main components on the Keyboard

MCU_SEEED_XIAO_RP2040MCP23017_ML

Keyboard bill of materials (BOM)

254 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCU_SEEED_XIAO_RP2040
MCU_Seeed_XIAO_RP2040
U1
2
MCP23017_ML
U2, U4
71
SW_PUSH_45DEG
SW_Push_45deg
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +63
1
SW_PUSH_45DEG
SW_Push_45deg
SW28
2
SW_PUSH_45DEG
SW_Push_45deg
SW30, SW43
2
SW_PUSH_45DEG
SW_Push_45deg
SW45, SW70
2
SW_PUSH_45DEG
SW_Push_45deg
SW57, SW59
3
SW_PUSH_45DEG
SW_Push_45deg
SW73, SW74, SW75
1
SW_PUSH_45DEG
SW_Push_45deg
SW76
1
RotaryEncoder_Switch_MP
SW84
82
D
D1, D2, D3, D4, D5, D6, D7, D8 +74
86
WS2812B
D83, D84, D85, D86, D87, D88, D89, D90 +78

Keyboard design files

The KiCad project lives in the M0HID/Keyboard repository on GitHub; these links point at the commit this page was built from.

Keyboard: common questions

What microcontroller does the Keyboard use?

The Keyboard is built around the MCU_SEEED_XIAO_RP2040, from the RP2040/RP2350 family.

How big is the Keyboard PCB?

The Keyboard measures 309.7 × 117.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

254 components, from 12 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Keyboard design files?

From the M0HID/Keyboard repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Keyboard design in my own project?

The repository has no license, so all rights stay with M0HID. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Keyboard 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.

Similar boards