6 open source boards using the 7404
Real designs built with the 7404, 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.
PIC.C68
ProbablyNotArtyom
214 × 170 mm184 parts4LGPL-2.051
GSE14
stonedDiscord
163 × 249 mm102 parts2LBSD-2-Clause4
Prometheus-VLB
computerguy096
240.5 × 69.4 mm74 parts4LGPL-3.03
PICCopy
214 × 170 mm184 parts4LGPL-2.051
GIMIX DMA Floppy
roberto314
248.9 × 139.7 mm124 parts2LBSD-2-Clause1
GIMIX intelligent 3 port Serial
149.9 × 139.7 mm69 parts2LBSD-2-Clause1
The 7404 in open source designs
The gallery holds 6 open source boards using the 7404 from 4 GitHub repositories; a typical one measures about 214 × 154.8 mm and carries around 113 components.
50% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is .C68 by ProbablyNotArtyom.
Microcontrollers on boards using the 7404
7404: common questions
Where can I find a 7404 reference design?
Each of the 6 boards on this page is a real design using the 7404. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the 7404?
The 74LS123, 74LS132, 74LS245 and 74LS74 appear in the most repositories here.
Which microcontrollers do boards using the 7404 use?
Most are built on PIC (2).
How big is a typical board using the 7404?
The median is 214 × 154.8 mm, and 50% are two-layer designs.
What is the most popular open source board using the 7404?
By GitHub stars, .C68 by ProbablyNotArtyom, with 51 stars.
Can I simulate one of these boards using the 7404 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.