HardLabs

Mini-MIDI-Magic

arghya-v·Mini-MIDI-Magic·MIDI Board/MIDI Board.kicad_pcb

Mini-MIDI-Magic PCB layout, top view — open source RP2040/RP2350 board by arghya-v

About the Mini-MIDI-Magic PCB

Mini-MIDI-Magic is an open source RP2040/RP2350 PCB design by arghya-v, published on GitHub. It is a 2-layer board measuring 250 × 116 mm, with 49 components from 9 distinct parts.

Its main chip is the Orpheus Pico, from the RP2040/RP2350 family. Other key parts include the ADS1015 and PCM5100. By type, the board carries 22 diodes, 21 switches, 2 ICs, 2 connectors and 1 module.

It belongs with the audio designs in this gallery.

From the project

A midi controller I made using KICad

Author: Arghya Vyas Created On: September 29, 2025 Description: A simple custom MIDI controller I designed and built from scratch using KiCad and 3D modeling tools.

Project journal in the ORIGINAL-JOURNAL.md file!

- Compact 4×5 switch matrix for customizable key input

- Rotary encoders for parameter control (e.g. volume, modulation)

- Slide potentiometer for expressive MIDI control

Mini-MIDI-Magic, from the project README
From the project README

Main components on the Mini-MIDI-Magic

ADS1015PCM5100Orpheus Pico

Mini-MIDI-Magic bill of materials (BOM)

49 components, 9 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ADS1015
U1
1
PCM5100
U2
1
Orpheus Pico
A1
1
S37735R
J1
1
SD Card
J2
1
Adafruit Slide Pot: 4219
RV1
19
SW_Push_45deg
SW1, SW2, SW3, SW4, SW6, SW7, SW8, SW9 +11
2
SW5
SW5, SW10
22
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +14

Mini-MIDI-Magic design files

The KiCad project lives in the arghya-v/Mini-MIDI-Magic repository on GitHub; these links point at the commit this page was built from.

Mini-MIDI-Magic: common questions

What microcontroller does the Mini-MIDI-Magic use?

The Mini-MIDI-Magic is built around the Orpheus Pico, from the RP2040/RP2350 family.

How big is the Mini-MIDI-Magic PCB?

The Mini-MIDI-Magic measures 250 × 116 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mini-MIDI-Magic?

49 components, from 9 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 Mini-MIDI-Magic design files?

From the arghya-v/Mini-MIDI-Magic 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 Mini-MIDI-Magic design in my own project?

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

Can I test firmware for the Mini-MIDI-Magic 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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