HardLabs

Mini v0.3

northernpaws·catalina·hardware/boards/mini/v0.3/mini_v0.3.kicad_pcb

Mini v0.3 PCB layout, top view — open source STM32 board by northernpaws

About the Mini v0.3 PCB

Mini v0.3 is an open source STM32 PCB design by northernpaws, published on GitHub under the CERN-OHL-S-2.0 license. It is a 8-layer board measuring 20 × 40 mm, with 94 components from 29 distinct parts.

Its main chip is the STM32H750XBHx, from the STM32 family. Other key parts include the NAU88C22YG, IS42S16160J-6BLI, LTV-217-G and W25Q128JVS. By type, the board carries 59 capacitors, 18 resistors, 5 ICs, 5 inductors, 3 diodes and 2 crystals.

It belongs with the audio and dev boards & breakouts designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

Embedded Rust hardware and software ecosystem for audio and MIDI processing.

Catalina is an embedded-first Rust ecosystem for building music and audio processing devices, with a primary focus on ARM Cortex MCUs as the end-target.

The ecosystem is comprised of: A Rust crate providing a DSP and audio engine designed for embedded devices (heapless by default, small footprint). Various composable interfaces for quickly prototyping new instruments. Drivers for common audio codecs, SDRAM, etc. Windows, MacOS, and Linux support for developing audio chains before flashing to hardware. Future web interface for synth design, with WebUSB for direct device flashing. Two base…

Mini v0.3, from the project README
From the project README

Main components on the Mini v0.3

NAU88C22YGIS42S16160J-6BLILTV-217-GW25Q128JVSSTM32H750XBHx

Mini v0.3 bill of materials (BOM)

94 components, 29 distinct parts.

QtyPartRefs
1
NAU88C22YG
IC1
1
IS42S16160J-6BLI
IC3
1
LTV-217-G
U2
1
W25Q128JVS
U3
1
STM32H750XBHx
U4
1
Crystal_GND24
Y1
1
32.768kHz
Y3
1
Conn_ARM_JTAG_SWD_10
J1
1
DF40C-90DP-0.4V
J4
1
STATUS
D2
1
1N4148WS
D3
1
STATUS2
D4
1
120R
FB1
4
1K @100MHz
FB2, FB3, FB4, FB5
3
2.2 uF <100 mΩ ESR
C1, C2, C3
1
1uF 600mΩ
C4
26
100nF
C5, C7, C8, C9, C10, C11, C12, C13 +18
11
1uF
C6, C20, C21, C22, C23, C24, C25, C26 +3
5
C
C15, C39, C40, C46, C47
9
4.7uF
C16, C17, C18, C19, C28, C29, C36, C37 +1
Show 9 more
QtyPartRefs
1
10nF
C30
3
10uF
C34, C35, C69
2
4.7k
R1, R2
2
2k2
R3, R4
8
10k
R5, R10, R11, R12, R13, R14, R18, R19
3
R
R6, R15, R17
1
220R
R7
1
10Ω 5% 0.25W
R8
1
33Ω 5% 0.5W
R9

Mini v0.3 design files

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

Mini v0.3: common questions

What microcontroller does the Mini v0.3 use?

The Mini v0.3 is built around the STM32H750XBHx, from the STM32 family.

How big is the Mini v0.3 PCB?

The Mini v0.3 measures 20 × 40 mm, has 8 copper layers and is 1.6 mm thick.

How many components are on the Mini v0.3?

94 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mini v0.3 design files?

From the northernpaws/catalina repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mini v0.3 design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which northernpaws chose for the repository.

Can I test firmware for the Mini v0.3 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.

More boards in catalina

Earlier revisions in the repo: mini_v0.2

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