There’s a meme which may have a basis in truth, of a teenager left clueless when presented with a rotary telephone. The dial, in reality a mechanical pulse chain generator, …read more (https://hackaday.com/2026/03/11/a-rotary-dial-the-3d-printed-way/)

Are We Finally At The Point Where Phones Can Replace Computers?
https://hackaday.com/2026/03/11/are-we-finally-at-the-point-where-phones-can-replace-computers/

There was an ideal of convergence, a long time ago, when one device would be all you need, digitally speaking. [ETA Prime] on YouTube seems to think we’ve reached that …read more (https://hackaday.com/2026/03/11/are-we-finally-at-the-point-where-phones-can-replace-computers/)

3D Printing a Harmonic Pin-Ring Gearing Drive
https://hackaday.com/2026/03/11/3d-printing-a-harmonic-pin-ring-gearing-drive/

Cycloidal drives are a type of speed reducer that are significantly more compact than gearboxes, but they still come with a fair number of components. In comparison, the harmonic pin-ring …read more (https://hackaday.com/2026/03/11/3d-printing-a-harmonic-pin-ring-gearing-drive/)

Printing an Underwater Diving Helmet With Floating Air Supply
https://hackaday.com/2026/03/11/printing-an-underwater-diving-helmet-with-floating-air-supply/

Old-school diving helmets are deceivingly simple, even if they are – as [Hyperspace Pirate] puts it in a recent video – essentially the equivalent of an upside-down bucket with an …read more (https://hackaday.com/2026/03/11/printing-an-underwater-diving-helmet-with-floating-air-supply/)

Controlling Vintage Mac OS With AI
https://hackaday.com/2026/03/12/controlling-vintage-mac-os-with-ai/

Classic Mac OS was prized for its clean, accessible GUI when it first hit the scene in the 1980s. Back then, developers hadn’t even conceived of all the weird gewgaws …read more (https://hackaday.com/2026/03/12/controlling-vintage-mac-os-with-ai/)

How Would a Field Sequential Home Computer Have Worked?
https://hackaday.com/2026/03/12/how-would-a-field-sequential-home-computer-have-worked/

The early history of colour TV had several false starts, of which perhaps one of the most interesting might-have-beens was the CBS field-sequential system. This was a rival to the …read more (https://hackaday.com/2026/03/12/how-would-a-field-sequential-home-computer-have-worked/)

Mapping The Sound Field Of An Acoustic Levitator
https://hackaday.com/2026/03/12/mapping-the-sound-field-of-an-acoustic-levitator/

Sound! It’s a thing you hear, moreso than something you see with your eyes. And yet, it is possible to visualize sound with various techniques. [PlasmatronX] demonstrates this well, using …read more (https://hackaday.com/2026/03/12/mapping-the-sound-field-of-an-acoustic-levitator/)

Building a Robot Partner to Play Air Hockey With
https://hackaday.com/2026/03/12/building-a-robot-partner-to-play-air-hockey-with/