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Mt32-pi midi hat

chris-jh·mt32-pi-midi-hat

Mt32-pi midi hat layout, top view — open source Raspberry Pi board by chris-jh

About the Mt32-pi midi hat

Mt32-pi midi hat is an open source Raspberry Pi PCB design by chris-jh, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 64.3 × 56 mm, with 22 components from 16 distinct parts.

Its main chip is the Raspberry_Pi_2_3, from the Raspberry Pi family. Other key parts include the H11L1. By type, the board carries 8 connectors, 8 switches, 2 resistors, 1 IC, 1 diode and 1 capacitor.

It belongs with the audio and dev boards & breakouts designs in this gallery.

From the project

A Raspberry Pi Midi Hat for the project mt32-pi by Dale Whinham (https://github.com/dwhinham/mt32-pi)

This PCB is designed from the schematic available from the above project.

The Gerbers have been created from the recommendations at JLCPCB.

(https://support.jlcpcb.com/article/102-kicad-515---generating-gerber-and-drill-files)

You may need to re-generate for your chosen PCB Manufacturer

* Moved a trace that was too close to the mounting screw hole. Could cause a short if over tighten to expose the trace. (see https://github.com/chris-jh/mt32-pi-midi-hat/issues/3)

Mt32-pi midi hat, from the project README
From the project README

Main components on the Mt32-pi midi hat

H11L1

Mt32-pi midi hat bill of materials (BOM)

22 components, 16 distinct parts.

QtyPartRefs
1
H11L1
U1
1
MIDI IN
J1
2
OLED
J2, J3
1
DAC BOARD
J4
1
DAC BOARD
J5
1
CONTROL_PINS
J6
2
POST
J7, J8
1
Raspberry_Pi_2_3
Pi1
2
BUTTON_1
SW1, SW5
2
BUTTON_2
SW2, SW6
2
BUTTON_3
SW3, SW7
2
BUTTON_4
SW4, SW8
1
1N4148
D1
1
100nf
C1
1
220Ω
R1
1
1KΩ 5%
R2

Mt32-pi midi hat design files

The KiCad project lives in the chris-jh/mt32-pi-midi-hat repository on GitHub; these links point at the commit this page was built from.

Mt32-pi midi hat: common questions

What microcontroller does the Mt32-pi midi hat use?

The Mt32-pi midi hat is built around the Raspberry_Pi_2_3, from the Raspberry Pi family.

How big is the Mt32-pi midi hat?

The Mt32-pi midi hat measures 64.3 × 56 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mt32-pi midi hat?

22 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mt32-pi midi hat design files?

From the chris-jh/mt32-pi-midi-hat repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Mt32-pi midi hat design in my own project?

Yes, under the terms of its GPL-3.0 license, which chris-jh chose for the repository.

Can I test firmware for the Mt32-pi midi hat without the hardware?

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

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