In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a thick, plectrum-shaped chunk …read more (https://hackaday.com/2025/11/08/autopsy-of-a-first-generation-rx7-mazda-rotary-car-engine/)

Teardown of HP Optical Link and Signal Investigations Using Siglent Technology
https://hackaday.com/2025/11/08/teardown-of-hp-optical-link-and-signal-investigations-using-siglent-technology/

Anything with a laser has undeniable hacker appeal, even if the laser’s task is as pedestrian as sending data over a fiber optic cable. [Shahriar] from [The Signal Path] must …read more (https://hackaday.com/2025/11/08/teardown-of-hp-optical-link-and-signal-investigations-using-siglent-technology/)

2025 Component Abuse Challenge: Heat Activated LED Candles
https://hackaday.com/2025/11/08/2025-component-abuse-challenge-heat-activated-led-candles/

[Miroslav Hancar] wasn’t satisfied with abusing just a single component for our Component Abuse Challenge. He decided to abuse a whole assembly, in particular, some LED candles. In this project, …read more (https://hackaday.com/2025/11/08/2025-component-abuse-challenge-heat-activated-led-candles/)

The Cardboard Airplane Saga Continues
https://hackaday.com/2025/11/09/the-cardboard-airplane-saga-continues/

History is full of engineers making (or attempting to make) things out of the wrong stuff, from massive wooden aircraft to boats made of ice and sawdust. [PeterSripol] is attempting …read more (https://hackaday.com/2025/11/09/the-cardboard-airplane-saga-continues/)

Have They Found a Complete UNIX V4?
https://hackaday.com/2025/11/09/have-they-found-a-complete-unix-v4/

If you’ve ever combed boxes of old tech detritus in search of a nugget of pure gold, we know you’ll appreciate the excitement of discovering, in a dusty University of …read more (https://hackaday.com/2025/11/09/have-they-found-a-complete-unix-v4/)