2,233 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.
ESP32Esp32-c3
TadeasFrycak
45.7 × 21.3 mm32 parts2LGPL-3.017
AVR/ArduinoOpenkey cps1-dev
jwestfall69
108.3 × 94.3 mm21 parts2LUnlicense17
SharpMemoryLcdBreakout-PANELIZED
crehmann
62 × 42 mm10 parts2LCERN-OHL-S-2.017
Cpld cpu
jimmo
259.1 × 198.1 mm435 parts4LMIT16
Input shifter board
MobiFlight
80 × 80 mm138 parts2LNo license16
FPGATsuraraGB Main
rniwase
51 × 61 mm67 parts2LBSD-3-Clause16
F1c200s dev board
Mr-Bossman
62 × 46 mm58 parts2LNo license16
AVR/ArduinoSHARP FEATHER NANO
bitbank2
43.9 × 53.1 mm12 parts2LApache-2.016
ESP32DoorsignEPD
ahinrichs
34.3 × 30 mm10 parts2LTAPR-OHL-1.016
Kicad template arduino uno shield
joustava
52.7 × 53.3 mm4 parts2LMIT16
STM32Stm32h750-dev board
Essenceia
51.3 × 73 mm48 parts2LNo license15
Quad serial breakout
jamesfowkes
50 × 50 mm44 parts2LNo license15
AVR/ArduinoArd ltc2499-test
IowaScaledEngineering
122.3 × 71.1 mm40 parts2LNo license15
EVAL-MP8862
MisterHW
25 × 13 mm20 parts4LNo license15
Gameboy breakout board
willdurand
62 × 38 mm2 partsCC-BY-SA-4.015
AVR/ArduinoO
PubInv
140 × 190 mm199 parts2LAGPL-3.014
NXPCW Keyer Shield
softerhardware
100 × 50 mm96 parts2LNo license14
Nordic nRFEcad coffeecaller
tiacsys
65.6 × 54 mm78 parts2LCERN-OHL-S-2.014
Raspberry PiCanhat
onitake
65 × 30 mm37 parts2LCERN-OHL-1.214
STM32RSTM32F030C8T6 ProMiniPlus
r-pv
25.9 × 56.4 mm27 parts2LGPL-3.014
MicroBBPS
stasiselectronics
54 × 24 mm21 parts2LNo license14
RPi4 WigleBottle v2
bkobe
57.2 × 45.8 mm20 parts2LGPL-3.014
TSCSnakeDI
karlcswanson
76.2 × 50.8 mm16 parts2LMIT14
C64ExpansionBreakout
hackup
99.1 × 82.4 mm10 parts2LNo license14
FPGACPArti-FPGA-Development-Board
AAWO
100 × 100 mm393 parts4LNo license13
STM321016-Breadboard-Power-Supply
wilsondr9999
52.3 × 50.3 mm61 parts2LAGPL-3.013
Mesp240 3Dpad
hwreverse
181.1 × 117.2 mm60 parts2LMIT13
Nucleo2USB
dmitrystu
70 × 53 mm44 parts2LCERN-OHL-W-2.013
Ch224baseProdt
SdtElectronics
61.8 × 18.5 mm36 parts2LCERN-OHL-W-2.013
WP-2 IC-Card MRAM
bkw777
54 × 54 mm27 parts2LCustom license13
Shift register spi breakout
christrotter
75 × 30 mm15 parts2LMIT13
AVR/ArduinoAttiny85-dev board
tomasr8
44.6 × 16.6 mm13 parts2LMIT13
Periphlex
loopj
33.8 × 6.2 mm12 parts2LSHL-2.113
Ass shield
immortalserg
79.6 × 79.6 mm200 parts2LNo license12
RP2040/RP2350RTShield
o7-machinehum
89 × 61 mm87 parts4LCC-BY-NC-4.012
RP2040/RP2350USB-C-FUSB302-PI
bentwire
66.8 × 22 mm64 parts4LMIT12
Browse boards by part
AMS1117-3.3 1034USBLC6-2SC6 836RP2040 609W25Q128JVS 388TL072 309AP2112K-3.3 308TL074 274ESP32-S3-WROOM-1 266CH340C 242L7805 224Pico 21874HC595 213USBLC6-2P6 200LM358 19074LS04 175AP2112K-3.3TRG1 173ESP32-WROOM-32 167SRV05-4 165Arduino_Nano_v3.x 15974LS245 156LM7805_TO220 15574LS138 152W25Q128JVSIQ 15174LS32 148