19 open source boards using the 74LS240
Real designs built with the 74LS240, 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.
RC1802 CPU
tebl
99.1 × 99.1 mm54 parts2LGPL-3.032
ALU1 - 副本
Left-Hand
99.7 × 99.7 mm73 parts2LNo license19
ISA DualUARTParport
hkzlab
176.5 × 90.2 mm69 parts2LCC-BY-NC-4.018
TIM-011B
Board-Folk
232.8 × 204.2 mm149 parts2LNo license8
6809PC
danwerner21
244 × 244 mm155 parts2LNo license2
6809 Plus EPROM Version
roberto314
248.9 × 139.7 mm165 parts2LBSD-2-Clause1
6502PC
244 × 244 mm154 parts2LNo license1
MicroKit09 IO
electrickery
99.6 × 95 mm77 parts2LNo license1
Et2000
dbalsom
93.7 × 98.4 mm30 parts2LMIT1
SBC 8080 ECB
sladek
160.5 × 100.2 mm111 parts2LNo license0
ALU0
100 × 100 mm66 parts2LNo license19
GIMIX 6809 CPU Plus
248.9 × 139.7 mm165 parts2LBSD-2-Clause1
Lomax Thunder 186 Redux
RichCini
253.6 × 137.7 mm116 parts4LNo license1
LAIR Pro Logic Analyzer Interface for RC2014 Pro Bus
MustBeArt
103.1 × 49.9 mm11 parts2LNo license7
RC6802 CPU
99.1 × 99.1 mm53 parts2LCERN-OHL-1.26
GIMIX DMA Floppy
248.9 × 139.7 mm124 parts2LBSD-2-Clause1
St225 20427
schlae
136.8 × 199.1 mm212 parts2LNo license38
GIMIX Mainboard
482.6 × 228.6 mm80 parts2LBSD-2-Clause1
GIMIX DMA SASI
249.9 × 140.7 mm71 parts2LBSD-2-Clause1
The 74LS240 in open source designs
The gallery holds 19 open source boards using the 74LS240 from 14 GitHub repositories; a typical one measures about 176.5 × 137.7 mm and carries around 80 components.
95% are two-layer designs, the rest use four layers or more, and 42% carry an open source license.
The most starred is St225 20427 by schlae.
Parts used alongside the 74LS240
What boards using the 74LS240 are built for
74LS240: common questions
Where can I find a 74LS240 reference design?
Each of the 19 boards on this page is a real design using the 74LS240. 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 74LS240?
The 74LS244, 74LS00, 74LS04, 74LS138 and 74LS74 appear in the most repositories here.
How big is a typical board using the 74LS240?
The median is 176.5 × 137.7 mm, and 95% are two-layer designs.
What is the most popular open source board using the 74LS240?
By GitHub stars, St225 20427 by schlae, with 38 stars.
Can I simulate one of these boards using the 74LS240 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.