2,438 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.
DMM Giga Shield Version
oihdesigns
95.6 × 53.3 mm77 parts4LNo license2
Raspberry PiRaspberry Pi Zero W
ReshapeTUe
65 × 30 mm52 parts2LNo license2
ESP32Adafruit ESP32 Feather V2
iffycodes
50.8 × 22.9 mm51 parts2LNo license2
FPGAFpga dev board
murkyshelf
100 × 54 mm49 parts2LApache-2.02
TMSRGBCustom Hat v1 for JFF
herraa1
56 × 58 mm46 parts2LGPL-3.02
IDE Breakout
stonedDiscord
83.8 × 37.2 mm45 parts2LNo license2
Nordic nRFAdafruit nRF52840 Bluefruit Feather Express Rev E
Phalkon-Industries
50.8 × 22.9 mm43 parts2LCERN-OHL-S-2.02
RP2040/RP2350Devbackup
espcaa
33.6 × 25.4 mm41 parts2LNo license2
AVR/ArduinoGNSS GPS L86-M33 breakout with easyC panel
SolderedElectronics
162 × 164 mm31 parts2LTAPR-OHL-1.02
RP2040/RP2350Jackco esp32-pico panel v2
huming2207
99 × 99 mm29 parts2LNo license2
STM32ProjOne
EvanDesR
42.5 × 40.8 mm29 parts2LNo license2
Proto Servo Current Limiter Shield
cxxx1828
68.6 × 33 mm27 parts2LNo license2
AVR/ArduinoPluralsight Drumkit
jzkmath
101.6 × 53.3 mm24 parts2LGPL-3.02
AVR/ArduinoTemp
vedantjadhav304
59 × 35.1 mm23 parts2LNo license2
MIDI 5V I/O circuit
6r1d
50 × 40 mm18 parts2LMIT2
Farfadet - Dual transceiver Feather wing
tommag
50.8 × 22.9 mm15 parts2LNo license2
BB-BUTTONBAR
qboards
15.8 × 30.7 mm14 parts2LCC-BY-SA-4.02
Panel
timshac
75.5 × 72.7 mm14 parts2LCERN-OHL-P-2.02
MTCH6102 breakout
swanmatch
72 × 83 mm13 parts2LNo license2
AVR/ArduinoNrfShield
douglaslyon
68.6 × 53.3 mm10 parts2LGPL-3.02
Joystick 2-axis with pushbutton breakout panel
10 × 16.5 mm7 parts2LTAPR-OHL-1.02
NXP6502 DEV Output Board
acwright
100 × 100 mm7 parts2LCERN-OHL-P-2.02
Bigmax hat
ideometre
94 × 76.8 mm6 parts2LUnlicense2
Servo regulator
teostefan
10.5 × 21 mm6 parts2LNo license2
Doorbot lcd
makeitlabs
40.1 × 28.5 mm5 parts2LNo license2
Hall effect sensor analog
22 × 22 mm5 parts2LTAPR-OHL-1.02
Ttgo baseplate
Karijn
55.1 × 76.6 mm4 parts4LNo license2
Ms88sf2-breakboard
galopago
29.4 × 36.8 mm4 parts2LMIT2- schematic only · 300 partsSTM32
Sonar Development Board
bluerobotics
300 parts6LCERN-OHL-P-2.02 
RP2040/RP2350Dev real production
iamdarshg
105 × 105 mm310 parts4LNo license1
NI-9205 Breakout v2.0
HelloItzAlex
190.5 × 279.4 mm193 parts2LNo license1
FPGALightRail Eval Board
lightrail-dev
100 × 100 mm187 parts22LNo license1
PROM
mwwhited
177.5 × 157.5 mm145 parts2LMIT1
ESP32Teacup carrier merge test
thingino
257 × 117.5 mm131 parts4LGPL-3.01
Daughterboard.pre r14 csd18502 swap
BoomBoxRobotics
155 × 80.6 mm118 parts4LCC0-1.01
STM32Mp153-devboard
4ms
39.9 × 57.9 mm114 parts4LNo license1
Browse boards by part
AMS1117-3.3 1196USBLC6-2SC6 983RP2040 699W25Q128JVS 421AP2112K-3.3 376TL072 339TL074 307ESP32-S3-WROOM-1 304CH340C 274L7805 271Pico 25174HC595 248USBLC6-2P6 248LM358 228AP2112K-3.3TRG1 205Arduino_Nano_v3.x 19774LS04 193LM7805_TO220 185ESP32-WROOM-32 18274LS245 171SRV05-4 169W25Q128JVSIQ 16974LS138 16274LS32 161