7 open source boards using the ATmega328P-P
Real designs built with the ATmega328P-P, 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/ArduinoApple2Card
profdc9
160 × 78.2 mm77 parts2LNo license95
AVR/ArduinoISACard
189.7 × 95.9 mm99 parts2LCC-BY-SA-4.046- schematic only · 15 partsAVR/Arduino
Kicad firmware generation
DLR-RY
15 partsMIT26 
AVR/ArduinoMainboard
jypma
39.4 × 108 mm122 parts2LNo license8
AVR/ArduinoKamaji classic v1
iley
100 × 100 mm27 parts2LMIT4
AVR/ArduinoPcb1
odobot
93.1 × 79.3 mm34 parts2LNo license1
AVR/ArduinoAtmega32 Robot
75.9 × 67.9 mm28 parts2LNo license1
The ATmega328P-P in open source designs
The gallery holds 7 open source boards using the ATmega328P-P from 6 GitHub repositories; a typical one measures about 96.5 × 87.6 mm and carries around 34 components.
100% are two-layer designs, the rest use four layers or more, and 43% carry an open source license.
The most starred is Apple2Card by profdc9.
Microcontrollers on boards using the ATmega328P-P
What boards using the ATmega328P-P are built for
ATmega328P-P: common questions
Where can I find a ATmega328P-P reference design?
Each of the 7 boards on this page is a real design using the ATmega328P-P. 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 ATmega328P-P use?
Most are built on AVR/Arduino (7).
How big is a typical board using the ATmega328P-P?
The median is 96.5 × 87.6 mm, and 100% are two-layer designs.
What is the most popular open source board using the ATmega328P-P?
By GitHub stars, Apple2Card by profdc9, with 95 stars.
Can I simulate one of these boards using the ATmega328P-P 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.