2,246 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.
74HC165-breakout board
neilenns
88 × 40 mm29 parts2LMIT5
AVR/ArduinoPiFanIrHat
llegoff
65 × 56.5 mm28 parts2LCERN-OHL-1.25
Hx8k sram16-extension
maikmerten
32 × 54.3 mm24 parts4LMIT5
AVR/ArduinoNDriveShield
freetronics
68.6 × 53.3 mm22 parts2LNo license5
RP2040/RP2350DC34-Cyberdeck by skitz0
skitzo2000
86.2 × 74.1 mm20 parts2LCustom license5
Silverreed firmware
MathKnitting
68.6 × 53.3 mm20 parts2LMIT5
ESP8266ESP8266 Dev Board
ProZSolutions
40 × 47 mm17 parts2LNo license5
Ecp5evn sdram addon
kazkojima
55 × 42 mm15 parts2LMIT5
RS-485-Transceiver breakout hardware design
SolderedElectronics
38 × 22 mm14 parts2LTAPR-OHL-1.05
I2c uart board reference design
nebkat
44.8 × 26.8 mm14 parts2LNo license5
EurorackPowerBreakout
johnsquibb
22.9 × 52.1 mm13 parts2LMIT5
CO-sensor-MQ7-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.05
Xc9536xlBreakout
hotkeysoft
48.3 × 25.4 mm10 parts2LMIT5
Sapflow gauge
dotmote
25.2 × 22.8 mm8 parts2LNo license5
Kiisu smol
kiisu-io
34 × 34 mm8 parts2LCERN-OHL-S-2.05
Raspberry PiPcb s0-raspberrypi hat
klein0r
29.1 × 25.5 mm7 parts2LMIT5
Pcie friend 2
atctwo
61.1 × 47.4 mm6 parts2LNo license5
Raspberry PiPinbot electronics
Pinbot-factory
114 × 65 mm204 parts4LCERN-OHL-S-2.04
Kicad latte panda mu
futureshocked
170.1 × 100 mm196 parts4LNo license4
AVR/ArduinoAT90S2323/AT90S2343 demo board
atoomnetmarc
99.1 × 99.1 mm167 parts2LApache-2.04
Microchip SAMWT-220 RPi Hat and Rear IO
tuna-f1sh
173.5 × 85 mm152 parts2LGPL-3.04
RP2040/RP2350MOTOR RF HAT
Just4Stan
56 × 65 mm131 parts6LNo license4
RP2040/RP2350Diva card
diva-eng
85.4 × 53.7 mm92 parts2LMIT4
Raspberry PiUnfolding space hardware
jakobkilian
57 × 74.6 mm82 parts2LCC-BY-4.04
STM32LoRaWAN-Feather-Hardware
svcguy
63.5 × 22.9 mm82 parts2LNo license4
STM32MMDVM HS Hat
VR2VYE
65.1 × 30.2 mm75 parts2LNo license4
STM32Stm32f4xx minimal dev
amrithHN
70.8 × 70.8 mm74 parts4LGPL-3.04
Board 10x10 alubox
Squantor
90 × 98 mm64 parts2LMIT4
DotBot
DotBots
91.4 × 100.3 mm62 parts4LBSD-3-Clause4
Ethernet breakout W5500
38 × 54 mm59 parts2LTAPR-OHL-1.04
Triaxial loadcell breakout
Scottapotamas
60 × 30 mm52 parts2LNo license4
AVR/ArduinoAttiny prototype board
ma-ha
160 × 100 mm50 parts2LMIT4
NXPTeensy display shield
AnthonyDiGirolamo
179.3 × 66 mm50 parts4LApache-2.04
Unoq power shield
ramalamadingdong
53.3 × 68.6 mm49 parts4LGPL-3.04
STM32Sduino mb
roybaer
101.6 × 53.3 mm48 parts2LNo license4
Burnwing
CubeSource
68.8 × 22.9 mm48 parts2LNo license4
Browse boards by part
AMS1117-3.3 1052USBLC6-2SC6 844RP2040 613W25Q128JVS 390TL072 317AP2112K-3.3 312TL074 280ESP32-S3-WROOM-1 267CH340C 246L7805 228Pico 21974HC595 217USBLC6-2P6 203LM358 19674LS04 177AP2112K-3.3TRG1 174ESP32-WROOM-32 168SRV05-4 165Arduino_Nano_v3.x 162LM7805_TO220 15974LS245 15874LS138 153W25Q128JVSIQ 15374LS32 149