2,363 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.
Lcdconn50
deltabeard
51.3 × 14.7 mm4 parts2LCC-BY-SA-4.01
AMS1117 Breakout
ZDBioHazard
9.9 × 12.5 mm4 parts2LNo license1
NRF24-transceiver module-Breakout-Board
Smartech-git
40.5 × 29.5 mm3 parts2LNo license1
Tqfp44Breakout
hotkeysoft
58.4 × 22.9 mm3 parts2LMIT1
Rpi cool hat
schnitzeltony
15.2 × 51.1 mm3 parts2LCC-BY-4.01
CC2500-Breakout
mcauser
20.3 × 20.3 mm2 parts2LMIT1- schematic only · 140 parts
Synth32
markeby
140 partsNo license1 - schematic only · 47 partsESP32
MY-COOL-ESP32
bhardwajpragya1111-lgtm
47 partsNo license1 - schematic only · 26 parts
Athena-8-Bit-Computer
efcroasdell
26 partsCustom license1 - schematic only · 5 partsESP32
AirQualityBoxy
fablabnk
5 partsNo license1 - schematic only · 1 parts
Level shifter shield
ajokela
1 partsNo license1 - schematic only · 1 parts
Hiveboard
mycodo-hiveboard
1 partsGPL-3.01 
Dev board1
tbennellick
250 × 167.9 mm775 parts6LNo license0
Iv pulse mux
Brunner-neutrino-lab
300 × 120 mm418 parts4LNo license0
Fpga blaster
ericpearson1313
180.3 × 76.8 mm345 parts4LNo license0
Tiramisu
esicoe
154.1 × 147 mm312 parts4LNo license0
AVR/ArduinoHigh amp controller board
PubInv
205 × 190 mm291 parts2LAGPL-3.00
Core evb
itead
140 × 90 mm216 parts2LNo license0
RP2040/RP2350Control board
TrendBit
56 × 85 mm210 parts4LGPL-3.00
Raspberry PiNode pad v1
Sami9889
100 × 100 mm209 parts4LCERN-OHL-P-2.00
ESP32EEG-CAR-01 carrier board
stepvda
150 × 130 mm186 parts4LNo license0
Project
Ovens-Syntax
309.8 × 119.3 mm171 parts2LGPL-3.00
Stp16cp05-Led-Matrix-8x16-Breakout
jc-SpaceXp
101 × 83 mm169 parts2LNo license0
The cool keeb
dadancingmonkey
311.6 × 128.5 mm164 parts2LNo license0
AVR/ArduinoHAT CM4 183
ConnectBox
105.6 × 86.1 mm161 parts6LNo license0
RP2040/RP2350Adafruit Feather RP2040 Prop-Maker
dcuccia
50.8 × 22.9 mm160 parts2LMIT0
STM32Sim multiplexer
0x178F
436 × 70 mm150 parts4LApache-2.00
DSITx
greenburg
100 × 90 mm148 parts4LMIT0
ESP32ESP32-S3 Dev Board
hw-tinkerers
123.5 × 56.5 mm146 parts4LNo license0
FPGA-SCSI
DaveRichmond
159.6 × 94 mm143 parts2LCustom license0
FPGAGammapi zero
vikulin
65 × 30 mm142 parts4LSHL-2.10
RP2040/RP2350My keyboard
Axel-Jacobsen
386.1 × 84.1 mm138 parts2LNo license0
Lightsabre dac
Darmur
65 × 56 mm137 parts4LCC0-1.00
Giris
dubnubdubnub
70.1 × 60 mm136 parts4LApache-2.00
FPGAICEBreaker
frohro
73 × 37 mm133 parts4LNo license0
ESP32Prod board
family-mruby
90 × 70 mm125 parts4LCERN-OHL-S-2.00
Browse boards by part
AMS1117-3.3 1069USBLC6-2SC6 866RP2040 632W25Q128JVS 394TL072 319AP2112K-3.3 313TL074 281ESP32-S3-WROOM-1 268CH340C 249L7805 229Pico 22174HC595 218USBLC6-2P6 206LM358 20074LS04 180AP2112K-3.3TRG1 179ESP32-WROOM-32 169LM7805_TO220 167SRV05-4 165Arduino_Nano_v3.x 16474LS245 160W25Q128JVSIQ 15774LS138 15574LS32 152