2,573 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.
Fab-Drawing caravel-M.2-card-QFN
nic0villegasc
22 × 22 mm11 parts4LNo license0
LM555 Testboard
itsebuka
50 × 40 mm10 parts2LMIT0
Shield Adruino MEGA2560 Rev3
NadjB
101.6 × 53.3 mm10 parts2LNo license0
Lumenier Carrier Board
CabrilloRoboticsClub
50 × 64 mm7 parts2LMIT0
PCA9548A Breakout
chuahengli
66 × 76.2 mm7 parts2LNo license0
Meshgw hat routed
d3athstr
65 × 56 mm5 parts2LNo license0
DRV8825-breakoutBoard
louisbabeschneider
19 × 36.6 mm3 parts2LNo license0
Daughterboard
Ovens-Syntax
27.9 × 45.4 mm3 parts2LGPL-3.00
Breakout 10TSSOP
piercehowell
21.6 × 19.1 mm3 parts2LMIT0
Microstrip
Jameswill-Winsock
100 × 40 mm3 parts2LGPL-3.00
Tiwi breakout
jekhor
38.7 × 55.9 mm3 parts2LNo license0
Carrier 2cell
DashiellRussell
111.5 × 47.8 mm3 parts2LNo license0
RP2040/RP2350DS18B20-Breakout-Board
enolf
25 × 14 mm3 parts2LNo license0
Usb c intercept
leo60228
27.9 × 62.2 mm3 parts2LNo license0
88 Pin Vag Breakout
rusefi
142 × 58 mm91 parts2LGPL-3.01.2k
AVR/ArduinoEasyduino Atmega Nano
Hanqaqa
43.4 × 18 mm30 parts4LCERN-OHL-P-2.0746
Hat
pa3gsb
65 × 56 mm81 parts2LNo license675
ESP32L0 ESP32
Luos-io
20.3 × 34.8 mm23 parts2LMIT547
ESP8266RatGDO-OpenSource-D1Mini-ESP8266
Kaldek
47.8 × 63.3 mm12 parts2LMIT506
ESP32
Chrismettal
66.4 × 48.1 mm20 parts2LCC-BY-SA-4.0446
ESP32ESP32-PoE Rev M2
OLIMEX
28 × 80 mm131 parts4LApache-2.0407
Panel proto data slicer board
PantsForBirds
56 × 37.5 mm13 parts2LGPL-3.0322
ESP32ESP32-EVB
75.2 × 74.7 mm157 parts2LApache-2.0285
RP2040/RP2350Protoesp
CRImier
97.5 × 90 mm127 parts2LGPL-3.0253
Imac g3 slot loading J22 adapter board
qbancoffee
65 × 30 mm8 parts2LLGPL-3.0236
Shield
ergonautkb
22.5 × 71.3 mm3 parts2LCERN-OHL-P-2.0206
FLIPPER ETHERNET
ElectronicCats
67 × 25 mm25 parts2LNo license130
DNMS-RPI-HAT-V1.0
hbitter
65 × 30 mm13 parts2LGPL-3.088
STM32ArmTrax OG
embeddedalpha
93.6 × 32 mm92 partsMIT75
ESP32ESP32-P4-DevKit Rev C
30 × 72 mm150 parts4LGPL-3.059
Dummy cell
iorodeo
31.8 × 50.8 mm6 parts2LCC-BY-4.057
MicroSD to DIP TXB0104
vul-os
30.5 × 20.3 mm13 parts2LApache-2.055
AVR/ArduinoZipper v.2
myriadrf
107 × 78 mm172 parts6LNo license50
MTMatrixRoundedAgain
Architeuthis-Flux
82.6 × 53.3 mm19 parts2LGPL-3.050
Clear Chip Development Board
efabless
76.2 × 73.8 mm84 parts2LNo license40
Afterglow 3.0 Debug Hat
bitfieldlabs
64.4 × 81 mm97 parts2LNo license32
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