721 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.
MuBook
LtBrain
170.2 × 142 mm260 parts4LMIT36
RP2040/RP2350Mitayi-Pico-D1
CIRCUITSTATE
51 × 21 mm51 parts2LMIT36
Klipper nano expander
orobardet
65.3 × 18.3 mm34 parts2LMIT35
Teacup
HackerComputerCompany
86.2 × 56.2 mm76 parts4LGPL-2.031
ESP32USBee32-S2
dhairyashah1
28.1 × 68.3 mm47 parts2LMIT31
STM32Shirley-FC-Dev-Board
Bare-Metal-Foundry
56 × 46 mm110 parts4LNo license29
TeensyFOC-Carrier
tthom289
39.2 × 52.3 mm11 parts2LMIT29
ESP8266Homeassistant automaic greenhouse
felixwittwer
162 × 60 mm20 parts2LCC-BY-NC-4.027
STM32MMDVM RPT Hat
mathisschmieder
65 × 56 mm103 parts2LNo license26
FPGAICE40-fpga
joshajohnson
50 × 22.9 mm62 parts2LCC-BY-NC-4.026
CH330 Hardware
Jana-Marie
10 × 10 mm9 parts2LGPL-3.026
STM32RPI5-CFE-Hat
will127534
65 × 56 mm44 parts4LMIT25
ATF15xx-EVB
whitequark
25.4 × 50.8 mm14 parts2LCC0-1.025
FPGAM.2-FPGA-Accelerator
KaiPereira
22 × 80 mm276 parts6LNo license24
ESP32OkayCAN
jglim
64.8 × 41 mm32 parts2LMIT24
RP2040/RP2350Pico stretch
jvanderberg
84.8 × 21 mm59 parts4LNo license23
Spark inducer
30350n
233.3 × 128.5 mm104 parts2LCERN-OHL-W-2.022
ESP32ESP32-C3-DevBoard
21km43
25.4 × 26 mm15 parts2LNo license20
PiPLC-Mainboard
Chrismettal
158 × 85 mm144 parts2LCC-BY-SA-4.019
STM32Perdican
Gabouin
37.1 × 39.5 mm35 parts2LMIT19
AcCCS
IdahoLabResearch
172.1 × 143.5 mm106 parts2LMIT18
ESP32Open-ESPilot
Tomas-Kuchta-FPV
50.6 × 71.1 mm98 parts2LCERN-OHL-W-2.018
WCH CH32/CH55xCh552g dev board
blueOkiris
55.9 × 50.8 mm9 parts2LGPL-3.018
RP2040/RP2350MiSTle - GW3A LV20 LQ144 Development Board
MiSTle-Dev
110 × 67 mm167 parts2LNo license17
STM32Stm32h750-dev board
Essenceia
51.3 × 73 mm48 parts2LNo license15
AVR/ArduinoO
PubInv
140 × 190 mm199 parts2LAGPL-3.014
STM321016-Breadboard-Power-Supply
wilsondr9999
52.3 × 50.3 mm61 parts2LAGPL-3.013
Mesp240 3Dpad
hwreverse
181.1 × 117.2 mm60 parts2LMIT13
WP-2 IC-Card MRAM
bkw777
54 × 54 mm27 parts2LCustom license13
Ublox breakout
thinkfat
47.2 × 33.2 mm44 parts4LNo license12
ESP32STM32L0-ESP32-Breakout-Board
mohamedyanis
50 × 50 mm31 parts4LBSD-3-Clause12
LT3045 breakout
PatrickBaus
10.2 × 14.6 mm10 parts2LCERN-OHL-1.212
MounT K85 Feather
50.8 × 22.9 mm10 parts2LGPL-3.012
STM32Hx4k pmod
rschlaikjer
100 × 55 mm97 parts2LMIT11
PistormTester
abrugsch
99.8 × 99.8 mm92 parts2LNo license11
EX-MotorShield8874
DCC-EX
65.9 × 52.9 mm75 parts4LCERN-OHL-W-2.011
Browse boards by part
AMS1117-3.3 345USBLC6-2SC6 296RP2040 224W25Q128JVS 135TL072 118CH340C 116AP2112K-3.3 103ESP32-S3-WROOM-1 97TL074 94AP2112K-3.3TRG1 82SRV05-4 73W25Q128JVSIQ 73USBLC6-2P6 70Pico 52L7805 50XC6206P332MR 50MCP73831T-2ACI/OT 49SN65HVD230 49AMS1117-5.0 48ESP32-S3-WROOM-1-N16R8 48LM393 44BME280 43DW01A 43LAN8710A-EZC(QFN32) 43