Giftmüll als Rohstoff: Wie aus gefährlichem Abfall Stahl wird

Rotschlamm aus der Aluminiumherstellung kann aus Ausgangsstoff für Stahl dienen

Partial Relay-Based Calculator Puts The Click Where It Counts

It looks like [Michal Zalewski] is raising the next generation the right way. First, his eldest son asks for help building a one-bit computer from discrete transistors. Not to be left behind, his l…

Hackaday Prize 2023: Building A Relay ALU

There’s much truth in the advice that, to truly understand something, you need to build it yourself from the ground up. That’s the idea behind [Christian]’s entry for the Re-engin…

A NOR Gate For An ALU?

If you know anything about he design of a CPU, you’ll probably be able to identify that a critical component of all CPUs is the Arithmetic Logic Unit, or ALU. This is a collection of gates th…

The Q2, A PDP8-Like Discrete Transistor Computer

[Joe Wingbermuehle] has an interest in computers-of-old, and some past experience of building computers on perfboard from discrete transistors, so this next project, Q2, is a complete implementatio…

Virtual Eurorack Based CPU Computes To The Beat Of A Different Drum Module

In Arthur C. Clarke’s 1972 story “Dial F for Frankenstein”, the worlds first global network of phone exchanges was created by satellite link, and events happened that caused the c…

An ALU As A Desktop Calculator Has Stunning Style From Days Gone By

Those of you with an interest in microcomputer history will know that there is a strong crossover between the path of electronic calculator evolution and the genesis of the integrated CPU. Intel&#8…

Thousands Of Discrete MOSFETs Make Up This Compact CPU-Less Computer

How long has it been since a computer could boast about the fact that it contained 2,500 transistors? Probably close to half a century now, at a guess. So in a world with a couple of billion transi…