HardLabs

Musepad

penguinissus·musepad·pcb/midi-keyboard.kicad_pcb

Musepad PCB layout, top view — open source RP2040/RP2350 board by penguinissus

About the Musepad PCB

Musepad is an open source RP2040/RP2350 PCB design by penguinissus, published on GitHub. It is a 2-layer board measuring 171.8 × 108 mm, with 69 components from 5 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 34 switches, 33 diodes, 1 module and 1 connector.

It belongs with the keyboards and audio designs in this gallery.

From the project

Firmware: 1. go to circuitpython.org/downloads 2. download circuitpython for raspberry pi pico 3. plug in keyboard to laptop and make sure to use a data transmitting cable 4. open up the pico folder in your computer's directory 5. replace the content of code.py in the pico folder

Firmware: 1. go to circuitpython.org/downloads 2. download circuitpython for raspberry pi pico 3. plug in keyboard to laptop and make sure to use a data transmitting cable 4. open up the pico folder in your computer's directory 5. replace the content of code.py in the pico folder with the one in this repo (root://code/code.py)

I first came up with some drawings of the design to make sure I knew how the layout kind of looked like. Then I made the schematic and PCB design on keycad, mostly following a tutorial (refer to the first resource link). I made the CAD on onshape mostly using skills I…

Musepad, from the project README
From the project README

Main components on the Musepad

RaspberryPi_Pico

Musepad bill of materials (BOM)

69 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RaspberryPi_Pico
A1
1
CONN_01X04
Conn_01x04
J1
33
SW_PUSH_45DEG
SW_Push_45deg
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +25
1
SW_PUSH_45DEG
SW_Push_45deg
SW44
33
1N4148
D1, D2, D3, D4, D5, D6, D8, D9 +25

Musepad design files

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

Musepad: common questions

What microcontroller does the Musepad use?

The Musepad is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Musepad PCB?

The Musepad measures 171.8 × 108 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Musepad?

69 components, from 5 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 Musepad design files?

From the penguinissus/musepad 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 Musepad design in my own project?

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

Can I test firmware for the Musepad 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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