6 open source boards using the 74HC251
Real designs built with the 74HC251, 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.
CFT Processor Board 0
alexiosc
233.4 × 280 mm274 parts2LGPL-3.06
Input32DC
DavidMFlynn
66 × 117 mm218 parts2LMIT1
Main Board
juniperlynx
212 × 126 mm75 parts2LNo license1
Cft ctl
131.9 × 164.6 mm195 parts4LGPL-3.06
Cft ctl dip
131.9 × 164.6 mm195 parts4LGPL-3.06
AVR/ArduinoDebugging Front Panel
280 × 164.6 mm165 parts2LGPL-3.06
The 74HC251 in open source designs
The gallery holds 6 open source boards using the 74HC251 from 3 GitHub repositories; a typical one measures about 171.9 × 164.6 mm and carries around 195 components.
67% are two-layer designs, the rest use four layers or more, and 83% carry an open source license.
The most starred is CFT Processor Board 0 by alexiosc.
Microcontrollers on boards using the 74HC251
What boards using the 74HC251 are built for
74HC251: common questions
Where can I find a 74HC251 reference design?
Each of the 6 boards on this page is a real design using the 74HC251. 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 74HC251 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the 74HC251?
The median is 171.9 × 164.6 mm, and 67% are two-layer designs.
What is the most popular open source board using the 74HC251?
By GitHub stars, CFT Processor Board 0 by alexiosc, with 6 stars.
Can I simulate one of these boards using the 74HC251 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.