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.
ESP32ESP32-PoE Rev L
OLIMEX
28 × 80 mm131 parts4LApache-2.0407
RP2040/RP2350Proto ads bee mcu board
PantsForBirds
55 × 58 mm20 parts2LGPL-3.0322
ESP32ESP32-EVB
75.2 × 74.7 mm157 parts2LApache-2.0285
Teensy eurorack breakout
newdigate
110.5 × 111.1 mm73 parts2LMIT258
RP2040/RP2350Piano solenoid controller
CRImier
122.5 × 100 mm179 parts2LGPL-3.0253
AVR/ArduinoJ2o Board
qbancoffee
82.6 × 52.5 mm16 parts2LLGPL-3.0236
Vikropad
sadekbaroudi
94 × 94.5 mm59 parts2LCERN-OHL-P-2.0219
Hivee
breadbee
11.4 × 31.8 mm3 parts2LGPL-3.0211
Pmw3360 pcb jst
siderakb
27 × 28 mm13 parts2LCERN-OHL-P-2.0194
VideoRAM
slu4coder
196.9 × 66.7 mm39 parts2LNo license184
STM32OtterPillG
Jana-Marie
43.2 × 17.6 mm37 parts2LCERN-OHL-S-2.0162
Taira top plate
strayer
151.5 × 121.2 mm41 parts2LMIT161
ESP32Marauder
ElectronicCats
67 × 28 mm31 parts2LNo license130
BE6502 Clock
tebl
45.7 × 99.1 mm29 parts2LCERN-OHL-1.2128
Cherry MX Breakout Board (Mill-Max-7305)
sszczep
18.3 × 25.9 mm3 parts2LMIT113
AVR/ArduinoPatch shield digital
OpenElectronicsLab
197 × 71 mm77 partsGPL-3.0102
Raspberry Pi 5 M.2 Hat
m1geo
65 × 56 mm40 parts4LMIT87
ESP32Lsa
SRA-VJTI
61.9 × 24.2 mm16 parts2LMIT80
IEEE Std. 1284 HAT+
worlickwerx
65 × 56.5 mm16 parts2LGPL-2.078
ESP32Test rig
tombueng
198.4 × 79.5 mm13 parts2LNo license78
STM32XESC
embeddedalpha
38 × 54 mm93 parts2LMIT75
Nordic nRFDevBoard
VolksEEG
134 × 127 mm16 parts2LGPL-3.075
Audio-Breakout
ctag-fh-kiel
27 × 66 mm28 parts2LNo license70
Chipkit Shield uC
imciner2
68.6 × 53.3 mm6 parts2LCC-BY-SA-4.065
TinyLoRa Breakout v1.1
azerimaker
22.9 × 50.8 mm38 partsCERN-OHL-S-2.061
ESP32ESP32-P4-DevKit Rev D1
30 × 72 mm154 parts4LGPL-3.059
Multiplexer
iorodeo
82.6 × 88.9 mm26 parts2LCC-BY-4.057
SirMighty
vul-os
61 × 20.5 mm33 parts2LApache-2.055
AVR/ArduinoSmartportsd nano shield
djtersteegc
69.9 × 55.9 mm17 parts2LMIT54
UMyriadRF7002
myriadrf
112.1 × 41.4 mm196 parts8LNo license50
AVR/ArduinoBreadControlV2-rounded 3
Architeuthis-Flux
82.6 × 53.3 mm58 parts2LGPL-3.050
RP2040/RP2350GateMateA1-EVB Rev C
120 × 80 mm288 parts4LGPL-3.046
Kiwikit rpi pico draft
kiwih
70 × 59 mm25 parts2LMIT46
Logitech Pedal Shield for Pro Micro
dmadison
31.2 × 48.1 mm6 parts2LGPL-3.044
FPGAICE40HX8K-EVB Rev B1
65 × 67 mm97 parts4LApache-2.041
Caravel Nucleo
efabless
68.1 × 92.5 mm89 parts2LNo license40
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