If you thought your home-brew project was taking a long time, [Jeroen Brinkman]’s MERCIA Relay Computer project probably has you beat. He began working on this impressive computer back in 2014, and ...

We all know you can build a computer out of relays, and if you’re a regular reader of Hackaday, you’ve probably seen a few. Actually designing and fabricating a computer built around relays is another ...

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 ...

66 years ago today, on the 9th September, 1947, operators of the Mark II Aiken Relay Computer being tested at Harvard University, found something curious trapped between points at Relay #70, Panel F.

The picoRing device ditches Bluetooth for a novel magnetic relay system linked to a wristband, slashing its power consumption to mere microwatts. When you purchase through links on our site, we may ...

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, ...

Nearly 70 years ago in September 1947, computer operators discovered what would eventually be known as the first actual computer bug. The bug, found 66 years ago on September 9 in a Mark II Aiken ...