[David] sent us a tip about a company in Belgium, Citronics, that is looking to turn old cellphones into single-board computers for embedded Linux applications. We think it’s a great …read more (https://hackaday.com/2025/04/08/turning-old-cellphones-into-sbcs/)

The Computers of EPCOT
https://hackaday.com/2025/04/08/the-computers-of-epcot/

Even if you aren’t a Disney fan, you probably know about EPCOT — Experimental Prototype Community of Tomorrow — a Disney attraction that promised a glimpse of the future. [ErnieTech] …read more (https://hackaday.com/2025/04/08/the-computers-of-epcot/)

FreeDOS 1.4 Released
https://hackaday.com/2025/04/08/freedos-1-4-released/

Even in 2025 there are still many applications for a simple Disk Operating System (DOS), whether this includes running legacy software (including MS-DOS games & Windows 3.x), or (embedded) systems …read more (https://hackaday.com/2025/04/08/freedos-1-4-released/)

Designing A Tone Control Properly
https://hackaday.com/2025/04/08/designing-a-tone-control-properly/

Many years ago, audio equipment came with a tone control, a simple RC filter that would cut or boost the bass to taste. As time passed, this was split into …read more (https://hackaday.com/2025/04/08/designing-a-tone-control-properly/)

ASCII to Mainframe
https://hackaday.com/2025/04/08/ascii-to-mainframe/

IBM mainframes are known for very unusual terminals. But IBM made many different things, including the IBM 3151 ASCII terminal, which uses a cartridge to emulate a VT220 terminal. [Norbert …read more (https://hackaday.com/2025/04/08/ascii-to-mainframe/)

Dozens of Solenoids Turn Vintage Typewriter into a Printer
https://hackaday.com/2025/04/08/dozens-of-solenoids-turn-vintage-typewriter-into-a-printer/

An electric typewriter is a rare and wonderful thrift store find, and even better if it still works. Unfortunately, there’s not as much use for these electromechanical beauties, so if …read more (https://hackaday.com/2025/04/08/dozens-of-solenoids-turn-vintage-typewriter-into-a-printer/)

Salamander Robot is Squishy
https://hackaday.com/2025/04/08/salamander-robot-is-squishy/

If you want to get started in microfluidic robotics, [soiboi soft’s] salamander is probably too complex for a first project. But it is impressive, and we bet you’ll learn something …read more (https://hackaday.com/2025/04/08/salamander-robot-is-squishy/)

Better Bearings Take the Wobble Out of Premium Scroll Wheel
https://hackaday.com/2025/04/09/better-bearings-take-the-wobble-out-of-premium-scroll-wheel/