5 open source boards using the 74LS251
Real designs built with the 74LS251, 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.
CP297s
Danjovic
155.1 × 156 mm127 parts2LGPL-3.04
ESP8266Soil Sensor Hub
ArtoLabs
98 × 91.1 mm74 parts2LMIT3
Block Relay Daughter
DavidMFlynn
157.5 × 99.1 mm92 parts2LMIT1
BBC-USBSlim
Board-Folk
84.1 × 54.2 mm44 parts2LNo license4
BBC-PS2
91.4 × 100.5 mm36 parts2LNo license4
The 74LS251 in open source designs
The gallery holds 5 open source boards using the 74LS251 from 4 GitHub repositories; a typical one measures about 98 × 99.1 mm and carries around 74 components.
100% are two-layer designs, the rest use four layers or more, and 60% carry an open source license.
The most starred is CP297s by Danjovic.
Microcontrollers on boards using the 74LS251
What boards using the 74LS251 are built for
74LS251: common questions
Where can I find a 74LS251 reference design?
Each of the 5 boards on this page is a real design using the 74LS251. 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 74LS251 use?
Most are built on ESP8266 (1).
How big is a typical board using the 74LS251?
The median is 98 × 99.1 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS251?
By GitHub stars, CP297s by Danjovic, with 4 stars.
Can I simulate one of these boards using the 74LS251 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.