4 open source boards using the ISO7721FDR
Real designs built with the ISO7721FDR, 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.
STM32Maiana Blue N2000 v8.2
Haimana
46 × 46 mm50 parts2LNo license3
Hauptmodul
LeoWatti99
100 × 61 mm47 parts2LGPL-3.00
Busmodul
100 × 38 mm32 parts2LGPL-3.00
ESP32ESP Interface Board
69 × 86 mm21 parts2LGPL-3.00
The ISO7721FDR in open source designs
The gallery holds 4 open source boards using the ISO7721FDR from 2 GitHub repositories; a typical one measures about 84.5 × 53.5 mm and carries around 40 components.
100% are two-layer designs, the rest use four layers or more, and 75% carry an open source license.
The most starred is Maiana Blue N2000 v8.2 by Haimana.
ISO7721FDR: common questions
Where can I find a ISO7721FDR reference design?
Each of the 4 boards on this page is a real design using the ISO7721FDR. 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 ISO7721FDR use?
Most are built on ESP32 (1) and STM32 (1).
How big is a typical board using the ISO7721FDR?
The median is 84.5 × 53.5 mm, and 100% are two-layer designs.
What is the most popular open source board using the ISO7721FDR?
By GitHub stars, Maiana Blue N2000 v8.2 by Haimana, with 3 stars.
Can I simulate one of these boards using the ISO7721FDR 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.