24 open source boards using the 74LS244
Real designs built with the 74LS244, 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.
TI99 22
danwerner21
350 × 224.3 mm242 parts2LNo license50- schematic only · 22 parts
NeoGeoAES-3.5
Board-Folk
22 partsNo license47 
TRS-80 Color Computer 3
qbancoffee
280 × 156.3 mm205 parts2LGPL-3.040
Dragon64
333.2 × 205.9 mm220 parts2LNo license34
Z80VDP1B
lynchaj
100 × 100 mm93 parts2LNo license31- schematic only · 419 parts
Retro-Schematics
omega9380
419 partsMIT19 
Microdigital - TK 2000
clemarfolly
236.8 × 169.8 mm195 parts2LNo license17
ESP32TI99 22
244 × 244 mm257 parts4LNo license4
BitStack-DigiTrainer
RetroStack
320 × 150 mm262 parts2LMIT2
Lomax ColorMagic Redux
RichCini
254 × 137.7 mm148 parts4LNo license1
Backup
333.2 × 205.9 mm218 parts2LNo license34
Z80VDP1A
100 × 100 mm90 parts2LNo license31
Lomax Thunder 186 Redux
253.6 × 137.7 mm116 parts4LNo license1
Backup1
333.2 × 205.9 mm218 parts2LNo license34
Z80DUART2
100 × 100 mm70 parts2LNo license31
Z80PRINT
100 × 100 mm66 parts2LNo license31
VIA Plus
demik
77.5 × 44.7 mm18 parts4LCERN-OHL-P-2.027
Z80PSG1
100 × 100 mm64 parts2LNo license31
Z80VDC
100 × 100 mm63 parts2LNo license31
Z80SERIAL3
100 × 100 mm61 parts2LNo license31
AVR/ArduinoZ80DMA2
100 × 100 mm59 parts2LNo license31
Z80SERIAL2
100 × 100 mm59 parts2LNo license31
Z80RAM3
100 × 100 mm58 parts2LNo license31- schematic only · 33 parts
PICDB
33 parts2LCERN-OHL-P-2.027
The 74LS244 in open source designs
The gallery holds 24 open source boards using the 74LS244 from 11 GitHub repositories; a typical one measures about 100 × 100 mm and carries around 92 components.
82% are two-layer designs, the rest use four layers or more, and 21% carry an open source license.
The most starred is TI99 22 by danwerner21.
Parts used alongside the 74LS244
Microcontrollers on boards using the 74LS244
What boards using the 74LS244 are built for
74LS244: common questions
Where can I find a 74LS244 reference design?
Each of the 24 boards on this page is a real design using the 74LS244. 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 74LS244?
The 74LS04, 74LS138, 74LS32, 74LS08 and 74LS245 appear in the most repositories here.
Which microcontrollers do boards using the 74LS244 use?
Most are built on AVR/Arduino (1) and ESP32 (1).
How big is a typical board using the 74LS244?
The median is 100 × 100 mm, and 82% are two-layer designs.
What is the most popular open source board using the 74LS244?
By GitHub stars, TI99 22 by danwerner21, with 50 stars.
Can I simulate one of these boards using the 74LS244 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.