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ZX81 RAM Upgrade

BrettHallen·Sinclair·ZX81_RAM_Upgrade/ZX81_RAM_Upgrade.kicad_pcb

ZX81 RAM Upgrade PCB layout, top view — open source board by BrettHallen
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About the ZX81 RAM Upgrade PCB

ZX81 RAM Upgrade is an open source PCB design by BrettHallen, published on GitHub. It is a 2-layer board measuring 24.8 × 36.8 mm, with 3 components from 3 distinct parts.

Other key parts include the 32KB SRAM. By type, the board carries 2 connectors and 1 IC.

It belongs with the test & measurement designs in this gallery.

From the project

Projects for Sinclair computers (ZX80, ZX81, TS1000, TS1500, TS2068, Spectrum and clones)

Note! These projects maybe work-in-progress and thus not completed or fully tested!

Main components on the ZX81 RAM Upgrade

32KB SRAM

ZX81 RAM Upgrade bill of materials (BOM)

3 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
32KB SRAM
U1
1
Address Expansion
J1
1
ZX81 RAM Socket
J2

ZX81 RAM Upgrade design files

The KiCad project lives in the BrettHallen/Sinclair repository on GitHub; these links point at the commit this page was built from.

ZX81 RAM Upgrade: common questions

How big is the ZX81 RAM Upgrade PCB?

The ZX81 RAM Upgrade measures 24.8 × 36.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ZX81 RAM Upgrade?

3 components, from 3 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ZX81 RAM Upgrade design files?

From the BrettHallen/Sinclair repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the ZX81 RAM Upgrade design in my own project?

The repository has no license, so all rights stay with BrettHallen. Use it as a reference, and ask the author before reusing the design.

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