HardLabs

Minimidi

Hita-haru·minimidi

Minimidi PCB layout, top view — open source RP2040/RP2350 board by Hita-haru

About the Minimidi PCB

Minimidi is an open source RP2040/RP2350 PCB design by Hita-haru, published on GitHub. It is a 2-layer board measuring 271 × 120 mm, with 73 components from 5 distinct parts.

Its main chip is the Orpheus_Pico, from the RP2040/RP2350 family. By type, the board carries 36 diodes, 35 switches, 1 module and 1 connector.

From the project

I was thinking I wish I could making songs with midi keyboard that graphical and useful. So I maked this midi keyboard.

Minimidi, from the project README
From the project README

Main components on the Minimidi

Orpheus_Pico

Minimidi bill of materials (BOM)

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

QtyPartRefs
1
Orpheus_Pico
A1
1
ST7735R
J1
34
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +26
1
RESET
SW35
36
1N4148WT
D1, D2, D3, D4, D5, D6, D7, D8 +28

Minimidi design files

The KiCad project lives in the Hita-haru/minimidi repository on GitHub; these links point at the commit this page was built from.

Minimidi: common questions

What microcontroller does the Minimidi use?

The Minimidi is built around the Orpheus_Pico, from the RP2040/RP2350 family.

How big is the Minimidi PCB?

The Minimidi measures 271 × 120 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Minimidi?

73 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 Minimidi design files?

From the Hita-haru/minimidi 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 Minimidi design in my own project?

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

Can I test firmware for the Minimidi 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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