1 open source board using the A3
Real designs built with the A3, 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.
qbancoffeeThe A3 in open source designs
The gallery holds 1 open source boards using the A3 from 1 GitHub repository; a typical one measures about 230 × 170 mm and carries around 150 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) by qbancoffee.
A3: common questions
Where can I find a A3 reference design?
Each of the 1 boards on this page is a real design using the A3. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
How big is a typical board using the A3?
The median is 230 × 170 mm, and 100% are two-layer designs.
What is the most popular open source board using the A3?
By GitHub stars, TRS-80 Color Computer 2 NTSC ( 26-3134B & 26-3136B) by qbancoffee, with 40 stars.
Can I simulate one of these boards using the A3 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.