3 open source boards using the LS157
Real designs built with the LS157, 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.
ZX-Spectrum-Issue-4B
iansbremner
213.4 × 130.8 mm199 parts2LNo license22- schematic only · 97 parts
K-1013-floppy disk controller replica
eduardocasino
97 partsCustom license3 
ZX Spectrum 48K
Bambelweeny57
213.1 × 129 mm201 parts2LNo license1
The LS157 in open source designs
The gallery holds 3 open source boards using the LS157 from 3 GitHub repositories; a typical one measures about 213.2 × 129.9 mm and carries around 199 components.
100% are two-layer designs, the rest use four layers or more, and 0% carry an open source license.
The most starred is ZX-Spectrum-Issue-4B-KiCAD by iansbremner.
What boards using the LS157 are built for
LS157: common questions
Where can I find a LS157 reference design?
Each of the 3 boards on this page is a real design using the LS157. 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 LS157?
The 4116, 4532, LM1889, LS00 and ROM appear in the most repositories here.
How big is a typical board using the LS157?
The median is 213.2 × 129.9 mm, and 100% are two-layer designs.
What is the most popular open source board using the LS157?
By GitHub stars, ZX-Spectrum-Issue-4B-KiCAD by iansbremner, with 22 stars.
Can I simulate one of these boards using the LS157 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.