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.
RISC-VButton unit grove i2c
74th
92.5 × 22 mm21 parts2LMIT1
Breakout
flesniak
84 × 30 mm7 parts2LNo license1
Power Breakout
TallesSantosCUBoulder
15.8 × 51.6 mm6 parts2LMIT1
AS6C62256 RAM Unit
oberrow
65.8 × 52.6 mm5 parts2LMIT1
Caravel
Rimal12345
54.5 × 52.1 mm72 parts2LNo license0
HAT ver 5.1
ConnectBox
56.6 × 71.6 mm68 parts2LNo license0
NXPBreakout
UCDFS
81.4 × 64.3 mm52 parts2LNo license0
Nucleo F446 power can shield
SamsonChau
139.7 × 104.9 mm50 parts2LNo license0
AVR/ArduinoEmbedduino
MAHESH-THILAK-K
67.5 × 82.7 mm46 parts2LApache-2.00
Cnc arduino hat
cpeniche
68 × 56 mm31 parts2LNo license0
AVR/ArduinoCarrier board arduino current driver
gkeiel
61.6 × 49.8 mm29 parts2LMIT0
STM32STM32F103
cristobalcuevas
42.7 × 34.5 mm28 parts2LNo license0
Registers
Robert-Riordan-UCD
89.8 × 50.6 mm27 parts2LCERN-OHL-P-2.00
Backplane mit Shield
felge1966
170.2 × 96.5 mm19 parts2LAGPL-3.00
M68K-Nucleo
DaveRichmond
71.1 × 97.8 mm18 parts2LCustom license0
Mp2303 breakout
ep-infosec
30 × 30 mm18 parts2LCC-BY-4.00
AVR/ArduinoIv pulse motherboard
Brunner-neutrino-lab
140 × 140 mm18 parts2LNo license0
ORA Arduino ESP CAN Shield Rev 1
gtrupiano
68.6 × 53.3 mm18 parts2LNo license0
ESP32ESP32 Breakout V1
saadmaziz
42 × 53 mm18 parts2LMIT0
Kicker breakout
LiU-SeeGoals
44 × 37.8 mm14 parts2LNo license0
Caravel breakout
pohantw
25.4 × 25.4 mm12 parts2LNo license0
5V Regulator
CrtomirJuren
48.3 × 29.2 mm8 parts2LNo license0
Pd booster null
mikegoelzer
11.9 × 24.6 mm7 parts2LCustom license0
Stomp breakout
Network-Direction
29.3 × 25.8 mm6 parts2LNo license0
Fram breakout
AvalonSemiconductors
19.3 × 37.1 mm4 parts2LApache-2.00
PICBMI323 Breakout Board
satomm1
26.5 × 23.9 mm4 parts2LMIT0
Breakout 112pin Connector
rusefi
174 × 58 mm39 parts2LGPL-3.01.2k
L0 stepper driver
Luos-io
20.3 × 15.2 mm18 parts2LMIT547
ESP32ESP32-PoE Rev J
OLIMEX
28 × 80 mm129 parts4LApache-2.0407
Proto lna board
PantsForBirds
23 × 11 mm12 parts2LGPL-3.0322
ESP32ESP32-EVB
75.2 × 74.7 mm146 parts2LApache-2.0285
NXPExpansion Breakout
Duet3D
88.5 × 28 mm22 partsCERN-OHL-1.2257
RP2040/RP2350Keyboard whiz
CRImier
65 × 56 mm74 parts2LGPL-3.0253
Flipper UWB
ElectronicCats
34 × 67 mm13 parts2LNo license130
STM32X1
embeddedalpha
30 × 80 mm57 parts2LMIT75
Xc9500xl 44 breakout
google
39.1 × 44.3 mm29 parts2LApache-2.059
Browse boards by part
AMS1117-3.3 1287USBLC6-2SC6 1056RP2040 725W25Q128JVS 444AP2112K-3.3 408TL072 347ESP32-S3-WROOM-1 324TL074 308CH340C 290L7805 29074HC595 267USBLC6-2P6 260Pico 258LM358 237AP2112K-3.3TRG1 22474LS04 207ESP32-WROOM-32 203Arduino_Nano_v3.x 202LM7805_TO220 20174LS245 18474LS138 176SRV05-4 17674LS08 17574LS32 175