HardLabs

Mpe32board

udu3324·mpe32board-midi·pcb/mpe32board/mpe32board.kicad_pcb

Mpe32board PCB layout, top view — open source STM32 board by udu3324

About the Mpe32board PCB

Mpe32board is an open source STM32 PCB design by udu3324, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 98 × 79 mm, with 165 components from 33 distinct parts.

Its main chip is the STM32H743IIT, from the STM32 family. Other key parts include the TAC5212IRGER, USBLC6-2P6, TCA9548ARGER, W9812G6KH-75 and LM1117MP-3.3. By type, the board carries 69 resistors, 40 capacitors, 33 connectors, 8 ICs, 7 diodes and 6 switches.

It belongs with the audio designs in this gallery.

From the project

an expressive midi controller that has onboard sound processing with super hackable io

Built in DSP Support for Programs and Sequencer Hacker Header Exposed GPIO Micro-SD Card Support * Onboard SDRAM for extended recording/memory

There is sample code here for trying out the mpe32sensors standalone on the Arduino platform.

Each key is press fit and can also be screwed in with a m3 screw and nut if needed.

Due to my 3d-printer being too small, I have to cut the board in half to print. This is later adhered with uv-glue.

Mpe32board, from the project README
From the project README

Main components on the Mpe32board

TAC5212IRGERUSBLC6-2P6TCA9548ARGERSTM32H743IITW9812G6KH-75LM1117MP-3.3

Mpe32board bill of materials (BOM)

165 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TAC5212IRGER
U1
1
USBLC6-2P6
U2
3
TCA9548ARGER
U4, U5, U6
1
STM32H743IIT
STM32H743IITx
U9
1
W9812G6KH-75
U10
1
LM1117MP-3.3
U11
2
BSS138
Q1, Q2
1
CN0295D
CN0295D LCD
1
FTSH-107-01-F-DV-K-P-TR
Conn_ST_STDC14
J1
1
USB4105-GF-A
USB_C_Receptacle_USB2.0_16P
J2
1
DNP
Conn_01x01_Socket
J3
24
BM04B-SRSS-TB
Conn_01x04
J4, J5, J6, J7, J8, J9, J10, J11 +16
1
1719710005
Conn_01x05
J44
1
DNP
Conn_01x04_Socket
J45
1
DNP
Conn_02x10_Counter_Clockwise
J46
1
DM3D-SF
Micro_SD_Card_Det_Hirose_DM3AT
J48
1
SJ-3524-SMT-TR
AudioJack3_SwitchT
J49
2
DNP
SW_Push
SW1, SW2
4
DNP
SW_Push
SW3, SW4, SW5, SW6
1
SS14
D1
Show 13 more
QtyPartRefs
6
SK6812MINI-E
D2, D3, D4, D5, D6, D7
2
10uF 1206 X7R
10μF
C1, C42
25
100nF 0603 X7R
100nF
C2, C3, C4, C5, C6, C7, C8, C9 +17
2
2.2uF 0603 X7R
2.2μF
C15, C16
3
1uF 0603 X7R
1μF
C21, C28, C43
3
10uF 1206 X7R
10μF
C26, C30, C32
3
0.1uF 0603 X7R
0.1μF
C27, C29, C31
2
47uF 0603 X7R
47μF
C33, C34
12
10k 0603
10kΩ
R1, R2, R21, R22, R23, R24, R59, R60 +4
2
5.1k 0603
5.1kΩ
R3, R4
48
2.2k 0603
2.2kΩ
R5, R6, R7, R8, R9, R10, R11, R12 +40
2
1k 0603
1kΩ
R41, R42
5
47k 0603
47kΩ
R95, R96, R97, R98, R99

Mpe32board design files

The KiCad project lives in the udu3324/mpe32board-midi repository on GitHub; these links point at the commit this page was built from.

Mpe32board: common questions

What microcontroller does the Mpe32board use?

The Mpe32board is built around the STM32H743IIT, from the STM32 family.

How big is the Mpe32board PCB?

The Mpe32board measures 98 × 79 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Mpe32board?

165 components, from 33 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 Mpe32board design files?

From the udu3324/mpe32board-midi 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 Mpe32board design in my own project?

Yes, under the terms of its GPL-3.0 license, which udu3324 chose for the repository.

Can I test firmware for the Mpe32board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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