2,332 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.
KoalaByte-Zero
greatwhitek9-lab
120 × 85 mm1 parts2LNo license2- schematic only · 12 parts
BME280-STEMMA-QT-Breakout
lilnetty43
12 partsCustom license2 
RP2040/RP2350Dev real
iamdarshg
105 × 105 mm310 parts4LNo license1
RP2040/RP2350Pixel blit
jvanderberg
197.5 × 122 mm205 parts4LCustom license1
Motherboard
morzack
125 × 85 mm194 parts4LNo license1
FPGAGLOWCOST-2v2-mppcInterface-
tharinduudu
65 × 56.5 mm194 parts6LNo license1
2025-2026 NI Breakout Board
HelloItzAlex
190.5 × 279.4 mm193 parts2LNo license1
Ecu dev board
D3stan
99.9 × 99.9 mm190 parts4LNo license1
STM32Card v0.1
northernpaws
67.6 × 35.4 mm189 parts6LCERN-OHL-S-2.01
Myo shield
Roboy
137.1 × 87 mm178 parts2LBSD-3-Clause1
STM32DP83848C-EvalBoard
kuellenberg
75 × 100 mm174 parts4LNo license1
Replicookie
cmcquinn
184.2 × 127 mm173 parts6LCERN-OHL-S-2.01
Simple OpAmp
mwwhited
306.2 × 215.1 mm173 parts2LMIT1
RemoraNucleoHat
ben-jacobson
138 × 162 mm166 parts2LGPL-3.01
Led matrix
farazaleboyeh
154.7 × 125.7 mm158 parts2LNo license1
ESP32Esp32-shield can1-can2-kdcan analogin sdcard
MrBlahhhh
98 × 100 mm140 parts4LNo license1
STM32Mp133-devboard
4ms
39.9 × 57.9 mm139 parts4LNo license1
NXPMLU BreakoutV2
ryos17
129.3 × 99 mm138 parts4LNo license1
NXPMLU BreakoutV2
valex2
129.3 × 99 mm138 parts4LNo license1
STM32Dev Board STM32F769
MarvinBrth
52 × 52 mm138 parts6LNo license1
Kch hw
srobo
65 × 56 mm136 parts2LNo license1
ESP32Teacup carrier
thingino
257 × 117.5 mm133 parts4LGPL-3.01
Ignitionlet
oxidecomputer
143.5 × 43.2 mm131 parts4LMPL-2.01
MARS Dev Board
innate-inc
108.4 × 89.2 mm126 parts6LCERN-OHL-S-2.01
Daughterboard
BoomBoxRobotics
155 × 80.6 mm118 parts4LCC0-1.01
LuckFox-Core3506-Carrier
Rufilla
89.7 × 66 mm117 parts4LApache-2.01
ModBus-RJ45-Breakout-2
the78mole
87 × 68 mm116 parts2LTAPR-OHL-1.01
ESP32NEAToBOARD
halfmarble
100 × 60 mm110 parts2LCERN-OHL-P-2.01
RISC-VCH32V203-devboard
silkscreen-studio
28.7 × 58.7 mm110 parts2LMIT1
STM32Stm32-shift display
gcoonrod
83.8 × 49.5 mm109 parts4LCC-BY-NC-4.01
STM32Chromapi motherboard
Mowibox
88.1 × 59.4 mm105 parts4LApache-2.01
ESP32ESP32-WROOM-32E + CC1101 Multiband
bdini13
90 × 36 mm105 parts4LCustom license1
Due behavior breakout
losonczylab
99 × 99 mm103 parts2LGPL-3.01
PICPIC DEV BOARD
anshukumar146
140.7 × 128.5 mm102 parts4LNo license1
ESP32Dcpower
hnz1102
58 × 90 mm101 parts2LNo license1
Uni clicker clone
sergiomd4
85 × 84.4 mm101 parts4LCC0-1.01
Browse boards by part
AMS1117-3.3 1069USBLC6-2SC6 866RP2040 632W25Q128JVS 394TL072 319AP2112K-3.3 313TL074 281ESP32-S3-WROOM-1 268CH340C 249L7805 229Pico 22174HC595 218USBLC6-2P6 206LM358 20074LS04 180AP2112K-3.3TRG1 179ESP32-WROOM-32 169LM7805_TO220 167SRV05-4 165Arduino_Nano_v3.x 16474LS245 160W25Q128JVSIQ 15774LS138 15574LS32 152