1 open source board using the CD74HCT221E
Real designs built with the CD74HCT221E, 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.
antevensThe CD74HCT221E in open source designs
The gallery holds 1 open source boards using the CD74HCT221E from 1 GitHub repository; a typical one measures about 535 × 308 mm and carries around 623 components.
100% use four copper layers or more, and 0% carry an open source license.
The most starred is Boatcontrol by antevens.
What boards using the CD74HCT221E are built for
CD74HCT221E: common questions
Where can I find a CD74HCT221E reference design?
Each of the 1 boards on this page is a real design using the CD74HCT221E. 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 CD74HCT221E?
The median is 535 × 308 mm, and 0% are two-layer designs.
What is the most popular open source board using the CD74HCT221E?
By GitHub stars, Boatcontrol by antevens, with 36 stars.
Can I simulate one of these boards using the CD74HCT221E 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.