702 open source STM32 boards
STMicroelectronics' Arm Cortex-M family, from the STM32F0 to the H7, plus STM8. Every board here is a public GitHub project with its KiCad files, read for size, layers and parts. Pick one close to your design and simulate its firmware on HardLabs before you build it.
STM32St link
lbthomsen
31 × 15 mm32 parts4LNo license31
STM32Shirley-FC-Dev-Board
Bare-Metal-Foundry
56 × 46 mm110 parts4LNo license29
STM32Kururugi-ESC
37.9 × 23.6 mm116 parts6LNo license27
STM32Overnumpad controller 1xb
purdeaandrei
69.6 × 37.3 mm65 parts2LCERN-OHL-P-2.027
STM32MMDVM RPT Hat
mathisschmieder
65 × 56 mm103 parts2LNo license26
STM32OpenFlops-W1D
silvervest
95 × 116 mm49 parts2LCustom license26
STM32Mist
modern-hobbyist
372.1 × 141.2 mm445 parts2LMIT25
STM32VNA
joshajohnson
100 × 66 mm207 parts2LGPL-3.025
STM32RPI5-CFE-Hat
will127534
65 × 56 mm44 parts4LMIT25
STM32Pcb
dcpedit
347.7 × 119.1 mm218 parts2LCC-BY-4.023
STM32FreeEEG32-alpha1.5
neuroidss
70 × 70 mm192 parts4LAGPL-3.023
STM32STM32F103RB USB to UART SPI I2C
Stulinaz
80 × 80 mm67 parts2LNo license23
STM32Otterlinear keyboard
Jana-Marie
214 × 84 mm136 parts2LNo license22
STM32Moco-RD501
ziteh
50 × 50 mm114 parts4LCERN-OHL-P-2.022
STM32Stm32-camera
Scottapotamas
36 × 36 mm58 parts4LNo license22
STM32X88-HW
cBachoo
344 × 124.1 mm120 parts2LCC-BY-SA-4.021
STM32F405 pill
davidmolony
54.1 × 19.4 mm46 parts4LBSD-3-Clause21
STM32Ferret
fullyautomated
50 × 50 mm116 parts4LNo license20
STM32Ctrl-M
nuess0r
171 × 50.5 mm18 parts2LCERN-OHL-S-2.020- schematic only · 223 partsSTM32
OM-64DO
OpenModbus
223 partsGPL-3.020 
STM32Oresat adcs card
oresat
99.8 × 94.6 mm579 parts4LGPL-2.019
STM32Perdican
Gabouin
37.1 × 39.5 mm35 parts2LMIT19
STM32Stm8s001rs485
TG9541
33.3 × 6.4 mm20 parts2LMIT19
STM32Relaymux
PetteriAimonen
120.4 × 100.4 mm55 parts2LBSD-2-Clause18
STM32BigBoy
transistorfet
160 × 100 mm120 parts4LMIT17
STM32AlcatelLeft
nearestexit
278.7 × 117.2 mm109 parts2LMIT16
STM32MotoHUDsch
wiciu15
128 × 55 mm97 parts2LNo license16
STM32Simpleflightcontroller
notaroomba
40 × 46 mm79 parts2LNo license16
STM32Travaulta WKL
calvin-mcd
208.3 × 75.8 mm46 parts4LCC-BY-NC-4.016
STM32Rii-518bt usb qmk
tangles-0
102.5 × 53 mm125 parts4LNo license15
STM32Tiny-Dimply-Qazy
ASH-ART
200 × 76.2 mm90 parts2LGPL-3.015
STM32Main Board
Terrapin-Rocket-Team
71 × 66 mm87 parts4LNo license15
STM32HenryFlops
hmerrett
111.6 × 59.4 mm77 parts2LCustom license15
STM32STLinkForm
grumat
73.7 × 38.1 mm65 parts2LGPL-2.015
STM32Stm32h750-dev board
Essenceia
51.3 × 73 mm48 parts2LNo license15
STM32RT-STACK
fupsrl
150 × 150 mm472 parts6LCC-BY-NC-4.014
Browse boards by part
AMS1117-3.3 345USBLC6-2SC6 296RP2040 224W25Q128JVS 135TL072 118CH340C 116AP2112K-3.3 103ESP32-S3-WROOM-1 97TL074 94AP2112K-3.3TRG1 82SRV05-4 73W25Q128JVSIQ 73USBLC6-2P6 70Pico 52L7805 50XC6206P332MR 50MCP73831T-2ACI/OT 49SN65HVD230 49AMS1117-5.0 48ESP32-S3-WROOM-1-N16R8 48LM393 44BME280 43DW01A 43LAN8710A-EZC(QFN32) 43