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.
Microchip SAMWLMS-v0 2 1-motherboard
miniscope
14 × 9.2 mm80 parts8LCERN-OHL-S-2.02
STM32DroneController
Monacrylic
55 × 55 mm65 parts4LNo license2
Fragaria core
Zhang-JK
22 × 42 mm64 parts4LNo license2
Raspberry PiRaspberry Pi Zero W (original)
ReshapeTUe
65 × 30 mm52 parts2LNo license2
Adafruit RA8875 TFT Breakout
lagunter145
48.3 × 40.6 mm47 parts2LNo license2
Robodev Power
alexbnz-1
106.5 × 91 mm44 parts4LMIT2
Bay card
dmz006
45 × 46 mm38 parts4LCustom license2
TMSRGBv2 Hat v1 for JFF
herraa1
56 × 73.5 mm13 parts2LGPL-3.02
AVR/ArduinoPluralsight Drumkit RevB Interface
jzkmath
71.6 × 53.3 mm13 parts2LGPL-3.02
MCP4728 breakout board
6r1d
26.6 × 14.8 mm8 parts2LMIT2
BB-AVRISP
qboards
27.2 × 21.9 mm8 parts2LCC-BY-SA-4.02
SparkFun Tri Axis Accel Breakout-H3LIS331DL
TUSI-KHU
16.5 × 38.1 mm7 parts4LApache-2.02
Joystick 2-axis with pushbutton breakout
SolderedElectronics
38 × 38 mm6 parts2LTAPR-OHL-1.02
RAK11300 BREAKOUT
galopago
29.4 × 52 mm4 parts2LMIT2
PCI Breakout
stonedDiscord
70 × 32 mm4 parts2LNo license2
RP2040/RP2350Dev board
iamdarshg
100 × 50 mm172 parts4LNo license1
Daughterboard.pre r13 topology backup
BoomBoxRobotics
155 × 80.6 mm113 parts4LCC0-1.01
AnalogComputer
mwwhited
120.7 × 80 mm109 parts4LMIT1
PC104 Connector Breakout Board
queens-satellite-team
139.1 × 55.1 mm105 parts2LNo license1
ESP32ESP32-WROOM-32E + CC1101 Multiband
bdini13
90 × 36 mm105 parts4LCustom license1
Mp153-carrier board
4ms
87.2 × 87.4 mm98 parts2LNo license1
ESP32ESP32 4 layers
Chirag-Vadrali
88.7 × 55.6 mm85 parts4LNo license1
Clear Chip Development Board
chipfoundry
76.2 × 73.8 mm84 parts2LNo license1
STM32Rythm mini v0.1
northernpaws
18 × 50 mm71 parts8LCERN-OHL-S-2.01
Nuclone JTAG interface
Squantor
50 × 50 mm64 parts2LMIT1
Teacup interposer t41
thingino
133.4 × 31.3 mm61 parts4LGPL-3.01
Giga shield v04 placed v4
ajokela
155 × 90 mm60 parts2LBSD-3-Clause1
Radxa Shield Rev. 1.2
Pro-engineer616
56 × 65.1 mm57 parts4LNo license1
Standalone Com Shield
TheOpenBMS
64.8 × 71.1 mm51 parts2LNo license1
Raspberry PiPiConnectLite
stephendade
65 × 30.5 mm42 parts2LGPL-3.01
ESP32ClearBell V0.2 Innen
akoerner-dev
98 × 60 mm33 parts4LMIT1
Shield v0.9.2
ARTS-Laboratory
71.5 × 50.3 mm32 parts2LCC-BY-SA-4.01
ESP32Main board
jevans3142
144.8 × 78.7 mm29 parts2LNo license1
ESP32HoloCade Child Shield
scifiuiguy
94.1 × 36.7 mm26 parts2LMIT1
Pi zero hat
Doenec
65 × 30 mm26 parts2LMIT1
Msxnano carrier
Papipapito
85 × 56 mm25 parts2LNo 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