6 open source boards using the 74F521
Real designs built with the 74F521, 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/ArduinoTCPU8-Alpha
halfburnttoast
150 × 150 mm138 partsGPL-2.04
PikaPC ViRGE Card
techav-homebrew
101.6 × 101.6 mm148 parts4LNo license3
PikaPC SIMM72
101.6 × 101.6 mm58 parts2LNo license3
PikaPC SRAM
101.6 × 101.6 mm44 parts2LNo license3
PikaPC KBC
101.6 × 101.6 mm41 parts2LNo license3
PikaPC IDE
101.6 × 101.6 mm36 parts2LNo license3
The 74F521 in open source designs
The gallery holds 6 open source boards using the 74F521 from 2 GitHub repositories; a typical one measures about 101.6 × 101.6 mm and carries around 51 components.
80% are two-layer designs, the rest use four layers or more, and 17% carry an open source license.
The most starred is TCPU8-Alpha by halfburnttoast.
Microcontrollers on boards using the 74F521
74F521: common questions
Where can I find a 74F521 reference design?
Each of the 6 boards on this page is a real design using the 74F521. 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 74F521 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the 74F521?
The median is 101.6 × 101.6 mm, and 80% are two-layer designs.
What is the most popular open source board using the 74F521?
By GitHub stars, TCPU8-Alpha by halfburnttoast, with 4 stars.
Can I simulate one of these boards using the 74F521 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.