36 open source boards using the 74LS30
Real designs built with the 74LS30, 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.
Space Odyssey
jotego
49.6 × 78.3 mm22 parts2LGPL-3.0335
TRS-80 Color Computer 3
qbancoffee
280 × 156.3 mm205 parts2LGPL-3.040
AVR/ArduinoPC-8001 SD
yanataka60
100 × 100 mm19 parts2LMIT28
Fennec6800
ChartreuseK
218 × 131.9 mm113 parts2LBSD-3-Clause20
ISA DualUARTParport
hkzlab
176.5 × 90.2 mm69 parts2LCC-BY-NC-4.018
Tandy-Color-Computer-Multi-Pak
djtersteegc
203.4 × 139.1 mm62 parts2LMIT16
AVR/ArduinoMZ2000 SD
100 × 100 mm26 parts2LMIT16
AVR/ArduinoFM-7 SD
100 × 100 mm17 parts2LMIT14
Junior interface
laurent-fr
217.2 × 113 mm116 parts2LCC-BY-NC-4.013
Coco9511pak
barberd
98.3 × 107.1 mm43 parts2LGPL-3.012
Betadisk clone
alvaroalea
99.7 × 149.9 mm83 parts2LNo license7
Vhd if c9d
popolonx
145 × 120 mm72 parts2LNo license7
AVR/ArduinoPC-6001 SD
79 × 127 mm17 parts2LMIT7
TheFinalChessCart Replica
bwack
148.9 × 58.1 mm38 parts2LNo license5
6502 board
ulmer-a
100 × 100 mm48 parts2LGPL-3.04
Mem decoder
magik6k
57.2 × 143.5 mm110 parts2LCustom license3
Cocousbhost
98.3 × 87.3 mm32 parts2LGPL-3.03- schematic only · 278 parts
ARCADE
antongale
278 parts2LNo license3 
Esh
RulecityLLC
299.7 × 229.9 mm182 parts2LBSD-3-Clause1- schematic only · 26 parts
Spies-Labs-NicePrint-Card
markadev
26 parts2LNo license23 
AVR/ArduinoMz-2000
115.8 × 142.8 mm25 parts2LMIT16
AVR/ArduinoQ10MF BOARD
brijohn
281 × 79 mm44 parts2LNo license9
TRS-80 Color Computer 3
baldengineer
280 × 155.3 mm204 parts2LCC-BY-4.0442- schematic only · 23 parts
Orange-Micro-Grappler+
23 parts2LNo license23 
AVR/ArduinoQX10 Titan QXPC Memory Board
254 × 63.5 mm40 parts2LNo license9
Vhd if c9c
100 × 152.1 mm68 parts2LNo license7
ZX81 Centronics
BrettHallen
68.8 × 82.6 mm18 parts2LNo license5- schematic only · 22 parts
Orange-Micro-Grappler+-Rev-C
22 parts2LNo license23 
Junior universal memory
160 × 100 mm38 parts2LCC-BY-NC-4.013
Qx10 sound card
281 × 79 mm32 parts2LNo license9
INTERFACE 8 ENTREES ANALOGIQUES ORIC
Fred72z
76.2 × 49.5 mm30 parts2LGPL-2.05
MEA8000
76.2 × 49.5 mm25 parts2LGPL-2.05- schematic only · 13 parts
Prometheus-PRT-1
13 parts2LNo license23 
ACIA USB
76.2 × 49.5 mm18 parts2LGPL-2.05
ACIA RS232
76.2 × 49.5 mm17 parts2LGPL-2.05
ACE-COLOUR2
flypie
165.1 × 114.3 mm95 parts2LGPL-3.013
The 74LS30 in open source designs
The gallery holds 36 open source boards using the 74LS30 from 25 GitHub repositories; a typical one measures about 100 × 100 mm and carries around 38 components.
100% are two-layer designs, the rest use four layers or more, and 53% carry an open source license.
The most starred is TRS-80 Color Computer 3 by baldengineer.
Parts used alongside the 74LS30
Microcontrollers on boards using the 74LS30
What boards using the 74LS30 are built for
74LS30: common questions
Where can I find a 74LS30 reference design?
Each of the 36 boards on this page is a real design using the 74LS30. 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 74LS30?
The 74LS04, 74LS32, 74LS00, 74LS374 and 74LS74 appear in the most repositories here.
Which microcontrollers do boards using the 74LS30 use?
Most are built on AVR/Arduino (7).
How big is a typical board using the 74LS30?
The median is 100 × 100 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS30?
By GitHub stars, TRS-80 Color Computer 3 by baldengineer, with 442 stars.
Can I simulate one of these boards using the 74LS30 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.