2,519 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.
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
AVR/ArduinoPluralsight Drumkit RevB Interface
jzkmath
71.6 × 53.3 mm13 parts2LGPL-3.02
TMSRGBv2 Hat v1 for JFF
herraa1
56 × 73.5 mm13 parts2LGPL-3.02
BB-AVRISP
qboards
27.2 × 21.9 mm8 parts2LCC-BY-SA-4.02
MCP4728 breakout board
6r1d
26.6 × 14.8 mm8 parts2LMIT2
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
PCI Breakout
stonedDiscord
70 × 32 mm4 parts2LNo license2
RAK11300 BREAKOUT
galopago
29.4 × 52 mm4 parts2LMIT2
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
TITAN Wheel Sensor Board
hpvdt
48 × 20 mm17 parts2LNo license1
UART Unit
oberrow
63.8 × 77.6 mm13 parts2LMIT1
Browse boards by part
AMS1117-3.3 1261USBLC6-2SC6 1030RP2040 714W25Q128JVS 441AP2112K-3.3 400TL072 342ESP32-S3-WROOM-1 314TL074 308CH340C 287L7805 28374HC595 258Pico 256USBLC6-2P6 256LM358 233AP2112K-3.3TRG1 21974LS04 204Arduino_Nano_v3.x 201ESP32-WROOM-32 199LM7805_TO220 19774LS245 17874LS138 174SRV05-4 17474LS32 171W25Q128JVSIQ 171