51 open source boards in Dev boards & breakouts
Development boards, breakouts, shields, HATs and carrier boards. 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.
FPGAIcepi zero
cheyao
65 × 30 mm143 parts4LSHL-2.1828
ESP32ESP32
Chrismettal
66.4 × 48.1 mm70 parts2LCC-BY-SA-4.0446
ESP32Sra dev board 2026
SRA-VJTI
90.2 × 90 mm145 parts2LMIT80
Raspberry PiMosaicHAT
septentrio-gnss
65 × 56.5 mm37 parts4LNo license63
Caravel-Nucleo v2-M.2
efabless
73.4 × 92.5 mm90 parts2LNo license40
MuBook
LtBrain
170.2 × 142 mm260 parts4LMIT36
STM32Shirley-FC-Dev-Board
Bare-Metal-Foundry
56 × 46 mm110 parts4LNo license29
PistormTester
abrugsch
99.8 × 99.8 mm92 parts2LNo license11
EX-MotorShield8874
DCC-EX
65.9 × 52.9 mm75 parts4LCERN-OHL-W-2.011
RP2040/RP2350Tfr9
strickyak
82.8 × 62.8 mm106 parts4LMIT9
STM32Stm32mp1-custom devboard
voloviq
120 × 80.6 mm194 parts4LNo license7
Unoq power shield
ramalamadingdong
53.3 × 68.6 mm49 parts4LGPL-3.04
Waveblaster to midi module adapter
nikitalita
33 × 94.5 mm6 parts2LApache-2.04
ESP32
66.4 × 48.1 mm20 parts2LCC-BY-SA-4.0446
ESP32Lsa
61.9 × 24.2 mm16 parts2LMIT80
ESP32Test rig
tombueng
198.4 × 79.5 mm13 parts2LNo license78
UMyriadRF7002
myriadrf
112.1 × 41.4 mm196 parts8LNo license50
Caravel Nucleo
68.1 × 92.5 mm89 parts2LNo license40
STM32Teensy SFOC
wgbowley
100 × 80 mm19 parts2LMIT8
Raspberry PiLamoka1-DEV-board
bearjhartjen
70 × 30 mm48 parts2LCERN-OHL-W-2.07
Unoq power shield
53.3 × 68.6 mm49 parts4LGPL-3.04
Connecting piece
66.4 × 24.5 mm20 parts2LCC-BY-SA-4.0446
UMyriadRF7002
59.3 × 41.4 mm177 parts8LNo license50
Clear Chip Development Board
76.2 × 73.8 mm84 parts2LNo license40
AVR/ArduinoATtiny 816/1616 Minibadge Devboard
Pips801
19 × 16.8 mm12 parts2LNo license7
ESP32
66.4 × 48.1 mm20 parts2LCC-BY-SA-4.0446
AVR/ArduinoZipper v.2
107 × 78 mm172 parts6LNo license50
Clear Chip Development Board
76.2 × 73.8 mm84 parts2LNo license40
IPod ESP32 barebones PCB
martinroger
59.7 × 64.8 mm14 parts2LMIT22
HP Fused Breakout
computergeek1507
85.5 × 40.3 mm30 parts2LCERN-OHL-1.210
ESP32
66.4 × 48.1 mm7 parts2LCC-BY-SA-4.0446
Ad9864 breakout
loxodes
44 × 39 mm83 parts4LNo license206
UMyriadRF6002
49.3 × 36.6 mm99 parts8LNo license50
5V Development Board
76.2 × 73.8 mm83 parts4LNo license40
ESP32Simple carrier board (CP2104)
76 × 56 mm9 parts2LMIT22
Caravel pcb
54.5 × 52.1 mm72 parts2LNo license40