4 open source boards using the MAX3221
Real designs built with the MAX3221, 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.
NXPEquipo AVL - vRaptor
brengi
120 × 80 mm160 parts2LNo license7
Microchip SAMWT-220 RPi Hat and Rear IO
tuna-f1sh
173.5 × 85 mm152 parts2LGPL-3.04
STM32UniversalboxArm
Solartraveler
112 × 57 mm153 parts4LNo license2
Raspberry PiHandcart hw
eagletrt
262.2 × 100 mm196 parts2LNo license1
The MAX3221 in open source designs
The gallery holds 4 open source boards using the MAX3221 from 4 GitHub repositories; a typical one measures about 146.7 × 82.5 mm and carries around 157 components.
75% are two-layer designs, the rest use four layers or more, and 25% carry an open source license.
The most starred is Equipo AVL - vRaptor by brengi.
Microcontrollers on boards using the MAX3221
What boards using the MAX3221 are built for
MAX3221: common questions
Where can I find a MAX3221 reference design?
Each of the 4 boards on this page is a real design using the MAX3221. 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 MAX3221 use?
Most are built on NXP (1), Raspberry Pi (1), Microchip SAM (1) and STM32 (1).
How big is a typical board using the MAX3221?
The median is 146.7 × 82.5 mm, and 75% are two-layer designs.
What is the most popular open source board using the MAX3221?
By GitHub stars, Equipo AVL - vRaptor by brengi, with 7 stars.
Can I simulate one of these boards using the MAX3221 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.