HardLabs

Musicboard

julbouln·musicboard·hardware/musicboard.kicad_pcb

Musicboard PCB layout, top view — open source STM32 board by julbouln

About the Musicboard PCB

Musicboard is an open source STM32 PCB design by julbouln, published on GitHub. It is a 2-layer board measuring 67.1 × 56.9 mm, with 74 components from 30 distinct parts.

Its main chip is the STM32F745VETx, from the STM32 family. Other key parts include the MCP1825S, S25FL256S and WM8731. By type, the board carries 36 capacitors, 19 resistors, 10 connectors, 4 ICs, 2 diodes and 1 crystal.

It belongs with the audio designs in this gallery.

From the project

USB audio and SF2 MIDI synthesizer sound card

This project only use a CODEC, a QuadSPI NOR-flash and a STM32F7 microcontroller to provide a complete MIDI + audio USB soundcard.

Continuation of https://github.com/julbouln/stm32f7discoverymidisynth prototype. It now uses a memory and computing optimized version of https://github.com/schellingb/TinySoundFont and includes STM32 cubemx source code. A dedicated custom board is also provided even though STM32F746 discovery board is supported by the firmware.

Main components on the Musicboard

STM32F745VETxMCP1825SS25FL256SWM8731

Musicboard bill of materials (BOM)

74 components, 30 distinct parts.

QtyPartRefs
1
STM32F745VETx
U1
1
MCP1825S
U2
1
S25FL256S
U3
1
WM8731
U4
1
25Mhz
Y1
1
USB_B_Mini
J1
3
AudioJack3
J2, J3, J4
3
Conn_01x02_Female
J5, J6, J10
1
Conn_01x04_Female
J7
1
Conn_01x06_Female
J8
1
Conn_01x04_Female
J9
1
SW_Push
SW1
2
LED
D1, D2
1
F-BEAD
L1
2
18pF
C1, C2
14
100nF
C3, C6, C7, C8, C10, C11, C12, C13 +6
2
2.2uF
C4, C5
2
1uF
C9, C14
6
10uF
C15, C19, C21, C23, C27, C28
2
4.7uF
C16, C17
Show 10 more
QtyPartRefs
2
1uF
C24, C25
4
220pF
C31, C32, C35, C36
2
220uF
C33, C34
4
10k
R1, R2, R5, R6
2
22
R3, R4
4
5.6k
R7, R12, R13, R14
2
100
R8, R10
4
47k
R9, R11, R15, R16
2
1k
R17, R19
1
0
R18

Musicboard design files

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

Musicboard: common questions

What microcontroller does the Musicboard use?

The Musicboard is built around the STM32F745VETx, from the STM32 family.

How big is the Musicboard PCB?

The Musicboard measures 67.1 × 56.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Musicboard?

74 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the Musicboard design files?

From the julbouln/musicboard repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Musicboard design in my own project?

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

Can I test firmware for the Musicboard 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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