HardLabs

BlackBox

Midlandswim·BlackBox·KiCAD/BlackBoxBLSI.kicad_pcb

BlackBox PCB layout, top view — open source STM32 board by Midlandswim

About the BlackBox PCB

BlackBox is an open source STM32 PCB design by Midlandswim, published on GitHub. It is a 4-layer board measuring 51.6 × 56.2 mm, with 61 components from 28 distinct parts.

Its main chip is the STM32U575CIT6, from the STM32 family. Other key parts include the BMP390, BMI323, ADP5063 and AMS1117-3.3. By type, the board carries 26 capacitors, 10 resistors, 7 ICs, 7 connectors, 5 switches and 1 crystal.

From the project

Flight Data Recorder for BSLI LRS

This is in partnership with Dhalwani Designs, which holds all rights, data, and procedures for this project and the related. This project was made for the Buckeye Space Launch Initiative Liquids Research Team.

Researcher: Wilson Dhalwani Aides: Mr. Julian Hooks (OSU) Context: Dhalwani Designs Sanctioned Project and BSLI Liquids Project Project Name: The Blackbox Start Date: January 09, 2025

Main components on the BlackBox

BMP390STM32U575CIT6BMI323ADP5063AMS1117-3.3

BlackBox bill of materials (BOM)

61 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
BMP390
U1, U11, U12
1
STM32U575CIT6
U3
1
BMI323
U8
1
ADP5063
U9
1
AMS1117-3.3
U10
1
Crystal 32.768 kHz
Y1
4
Conn_01x06_Pin
J1, J2, J3, J4
1
Barrel_Jack
J6
1
USB_B_Micro
J8
1
Micro_SD_Card
J9
1
4.2V Batt
BT1
2
270Ω
LEDRES1, LEDRES2
1
75Ω
LEDRES3
1
0.1uF
RSTCAP1
4
SW_SPDT
SW1, SW5, SW8, SW9
1
SW_Push
SW6
6
100nF
C1, C2, C43, C44, C45, C46
5
10 uF
C5, C12, C37, C40, C41
10
100 nF
C6, C7, C8, C9, C10, C11, C34, C35 +2
2
0.1 uF
C13, C14
Show 8 more
QtyPartRefs
1
3 pF
C15
2
22 uF
C38, C39
2
4.7kΩ
R6, R7
2
1Ω
R8, R9
2
10 kΩ
R18, R20
1
270 Ω
R19
1
10kΩ
R21
2
10k
R22, R23

BlackBox design files

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

BlackBox: common questions

What microcontroller does the BlackBox use?

The BlackBox is built around the STM32U575CIT6, from the STM32 family.

How big is the BlackBox PCB?

The BlackBox measures 51.6 × 56.2 mm, has 4 copper layers and is 2.49 mm thick.

How many components are on the BlackBox?

61 components, from 28 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 BlackBox design files?

From the Midlandswim/BlackBox 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 BlackBox design in my own project?

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

Can I test firmware for the BlackBox 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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