1958 FACOM 128B Japanese Relay Computer, still working!
I spent all summer building THIS! (relay computer)
Making of the 4 Bit Relay Adder
Relay computer compile, load and run
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Last Updated: October 17, 2026
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Summary
Project details: hackaday.io/project/2075. In this video I describe why the for 1-4 Layer PCBs, Get SMT Coupons: jlcpcb.com/DYE Support Ludic Science on Patreon: ... First test of my implementation of the ridiculously cool Zuse Demonstrate the basic logic of a binary adding machine built with In this video I go into detail about how to make all the logic gates using 0:00 Intro 0:53 The FACOM 128B 1:53 History of Thank for washing EDIT: I submitted this project to Hackaday and they wrote an article about it! Read that here: ...