Hardware Projects

Build videos and write-ups of ZX Spectrum-related hardware projects — replacement boards, interfaces, and upgrades, with PCBs manufactured at PCBWay.

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DRAM Tester for 4116/4164/4532: Diagnosing Dead Spectrum Memory

19 August 2026

Diagnostic PCBWay build Repair

Build video coming soon

A dead Spectrum with RAM-pack-wobble-style symptoms is usually one bad DRAM chip out of eight or sixteen. This tester lets you find the culprit by socketing chips one at a time, instead of swapping blind. Read the project page.