10 open source boards using the 7406
Real designs built with the 7406, 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.
Pi1541io
hackup
65 × 56 mm50 parts2LCC-BY-SA-4.0108
Vic2020mainboard
danwerner21
357.8 × 124.5 mm127 parts2LNo license78
C64-Pi1541-Module
tebl
65 × 56.5 mm18 parts2LNo license34
We816
360.1 × 141.4 mm128 parts2LNo license32- schematic only · 97 parts
K-1013-floppy disk controller replica
eduardocasino
97 partsCustom license3 
AVR/ArduinoSbc 8088
miselin
243.8 × 243.8 mm206 parts4LCERN-OHL-P-2.02
RP2040/RP2350We816-mark2
360.1 × 141.4 mm128 parts2LNo license1
EPROM Card
codesqueak
203.2 × 203.2 mm77 parts2LCERN-OHL-S-2.01
Lomax Thunder 186 Redux
RichCini
253.6 × 137.7 mm116 parts4LNo license1
St225 20427
schlae
136.8 × 199.1 mm212 parts2LNo license38
The 7406 in open source designs
The gallery holds 10 open source boards using the 7406 from 10 GitHub repositories; a typical one measures about 243.8 × 141.4 mm and carries around 122 components.
78% are two-layer designs, the rest use four layers or more, and 30% carry an open source license.
The most starred is Pi1541io by hackup.
Parts used alongside the 7406
Microcontrollers on boards using the 7406
What boards using the 7406 are built for
7406: common questions
Where can I find a 7406 reference design?
Each of the 10 boards on this page is a real design using the 7406. 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 7406?
The 74LS244, 74LS04, 74LS14, 74LS245 and 74LS00 appear in the most repositories here.
Which microcontrollers do boards using the 7406 use?
Most are built on AVR/Arduino (1) and RP2040/RP2350 (1).
How big is a typical board using the 7406?
The median is 243.8 × 141.4 mm, and 78% are two-layer designs.
What is the most popular open source board using the 7406?
By GitHub stars, Pi1541io by hackup, with 108 stars.
Can I simulate one of these boards using the 7406 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.