9 open source boards using the Arduino_UNO_R3
Real designs built with the Arduino_UNO_R3, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
AVR/ArduinoEUPLA CONE CORE
PineConeMechatronics
76.2 × 54 mm95 parts2LCERN-OHL-P-2.01
AVR/ArduinoShield-A V2.0.1
rsedak
68.8 × 53.6 mm42 parts2LCustom license1
AVR/ArduinoShield offset
apmarshall3
83.2 × 78.1 mm125 parts4LNo license0- schematic only · 18 partsAVR/Arduino
Doppler speed detector
darksunnp
18 partsNo license0 
AVR/ArduinoShield
83.2 × 69.2 mm82 parts2LNo license0
AVR/ArduinoXDuinoRail-RailComShield
chatelao
48.1 × 53 mm59 parts2LAGPL-3.00
AVR/ArduinoXDuinoRail-Protoboard
100 × 100 mm42 parts2LAGPL-3.00
ESP32XDuinoRailControl
48.3 × 40.6 mm16 parts2LAGPL-3.00
AVR/ArduinoXDuinoRail-Backplane-Arduino
100 × 50 mm12 parts2LAGPL-3.00
The Arduino_UNO_R3 in open source designs
The gallery holds 9 open source boards using the Arduino_UNO_R3 from 5 GitHub repositories; a typical one measures about 79.7 × 53.8 mm and carries around 42 components.
88% are two-layer designs, the rest use four layers or more, and 56% carry an open source license.
The most starred is EUPLA CONE CORE by PineConeMechatronics.
Microcontrollers on boards using the Arduino_UNO_R3
What boards using the Arduino_UNO_R3 are built for
Arduino_UNO_R3: common questions
Where can I find a Arduino_UNO_R3 reference design?
Each of the 9 boards on this page is a real design using the Arduino_UNO_R3. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the Arduino_UNO_R3 use?
Most are built on AVR/Arduino (8) and ESP32 (1).
How big is a typical board using the Arduino_UNO_R3?
The median is 79.7 × 53.8 mm, and 88% are two-layer designs.
What is the most popular open source board using the Arduino_UNO_R3?
By GitHub stars, EUPLA CONE CORE by PineConeMechatronics, with 1 stars.
Can I simulate one of these boards using the Arduino_UNO_R3 before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.