4 open source boards using the 74LS42
Real designs built with the 74LS42, 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.
Intellivision t card
abzman
143 × 174.7 mm75 parts2LUnlicense12
Main
ceteras
299.2 × 180 mm352 parts2LMIT11
AVR/ArduinoNova 1200 front panel
ForgottenMachines
397.5 × 119.4 mm203 parts2LNo license5
Leaky bucket
tpcarlson
20 × 128.5 mm110 parts2LNo license106
The 74LS42 in open source designs
The gallery holds 4 open source boards using the 74LS42 from 4 GitHub repositories; a typical one measures about 221.1 × 151.6 mm and carries around 157 components.
100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is Leaky bucket by tpcarlson.
Microcontrollers on boards using the 74LS42
What boards using the 74LS42 are built for
74LS42: common questions
Where can I find a 74LS42 reference design?
Each of the 4 boards on this page is a real design using the 74LS42. 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 74LS42?
The 74LS00, 74LS04, 74LS08, 74LS51 and 74LS74 appear in the most repositories here.
Which microcontrollers do boards using the 74LS42 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the 74LS42?
The median is 221.1 × 151.6 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS42?
By GitHub stars, Leaky bucket by tpcarlson, with 106 stars.
Can I simulate one of these boards using the 74LS42 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.