10 open source boards using the ATMEGA32U4-MU
Real designs built with the ATMEGA32U4-MU, 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/ArduinoUsbGpib
xyphro
54 × 15 mm21 parts2LMIT683
AVR/ArduinoGoldfish
staticintlucas
17.8 × 33 mm26 parts2LNo license219
AVR/ArduinoKBD8X-MKII
ai03-2725
343.7 × 118.3 mm342 parts2LCC-BY-NC-4.044
AVR/ArduinoSidewinderToUSBV2
Kreeblah
41.9 × 39.6 mm27 parts2LCC-BY-SA-4.028
RP2040/RP2350Nora
jpskenn
285 × 95.1 mm272 parts2LMIT12
AVR/ArduinoSuperLyra
Malevolti
391.1 × 134.8 mm199 parts2LGPL-3.012
AVR/ArduinoPegasus
melonbred
242.9 × 76.2 mm109 parts2LMIT8
AVR/ArduinoKoalafications
swiftrax
304.8 × 123 mm186 parts2LCC0-1.07
AVR/ArduinoMacrocat
catmunch
78.7 × 97.3 mm52 parts2LMIT0
AVR/ArduinoSuperLyra
391.1 × 134.8 mm199 parts2LGPL-3.012
The ATMEGA32U4-MU in open source designs
The gallery holds 10 open source boards using the ATMEGA32U4-MU from 9 GitHub repositories; a typical one measures about 263.9 × 96.2 mm and carries around 148 components.
100% are two-layer designs, the rest use four layers or more, and 80% carry an open source license.
The most starred is UsbGpib by xyphro.
Microcontrollers on boards using the ATMEGA32U4-MU
What boards using the ATMEGA32U4-MU are built for
ATMEGA32U4-MU: common questions
Where can I find a ATMEGA32U4-MU reference design?
Each of the 10 boards on this page is a real design using the ATMEGA32U4-MU. 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 ATMEGA32U4-MU use?
Most are built on AVR/Arduino (9) and RP2040/RP2350 (1).
How big is a typical board using the ATMEGA32U4-MU?
The median is 263.9 × 96.2 mm, and 100% are two-layer designs.
What is the most popular open source board using the ATMEGA32U4-MU?
By GitHub stars, UsbGpib by xyphro, with 683 stars.
Can I simulate one of these boards using the ATMEGA32U4-MU 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.