Recently, [Manuel] did a post on making logic gates out of anything. He mentioned a site about relay logic. While it is true that you can build logic gates using switch logic (that is, two switches in ...

A moth taped to a logbook page in 1947 became one of the most repeated origin stories in computing, and the physical evidence still exists. During testing of the Harvard Mark II at a Navy facility, ...

We are probably all familiar with computing history to the extent that we know the earliest computers were surprisingly simple devices. While early electronic machines such as Colossus or ENIAC were ...

This mini-series of articles describes how to build a computer’s CPU (central processing unit) out of relays. “Y” in English sounds like “guay” in Spanish (my mother tongue), a colloquial expression ...

AREVA T&D has announced IEC 61850 protocol certification of its MiCOM C264 bay computer and of the MiCOM P139 and P545 protection relays. Issued by KEMA, this certification is a new success that ...

Once you’ve seen this beauty of a relay computer in action, you’ll find it hard to resist the lure of building something similar yourself. Once you’ve seen this beauty of a relay computer in action, ...