Many of us have read about Stirling engines, engines which form mechanical heat pumps and derive motion from the expansion and contraction of a body of air. A very few …read more (https://hackaday.com/2022/04/13/home-made-stirling-engines-from-expedient-materials/)

2022 Sci-Fi Contest: A Hand-Following Robot, Powered by Arduino
https://hackaday.com/2022/04/13/2022-sci-fi-contest-a-hand-following-robot-powered-by-arduino/

If there’s one thing audiences love in sci-fi, it’s a cute robot companion that follows the heroes around. If you want one of your own, starting with this build from …read more (https://hackaday.com/2022/04/13/2022-sci-fi-contest-a-hand-following-robot-powered-by-arduino/)

Does Your Programmer Know How Fast You Were Going?
https://hackaday.com/2022/04/13/does-your-programmer-know-how-fast-you-were-going/

News reports were everywhere that an autonomous taxi operated by a company called Cruise was driving through San Francisco with no headlights. The local constabulary tried to stop the vehicle …read more (https://hackaday.com/2022/04/13/does-your-programmer-know-how-fast-you-were-going/)

Reducing Warping in Metal 3D Prints
https://hackaday.com/2022/04/13/reducing-warping-in-metal-3d-prints/

We are used to dealing with warping when printing with thermoplastics like ABS, but metal printers suffer from this problem, too. The University of Michigan has a new technology, SmartScan, …read more (https://hackaday.com/2022/04/13/reducing-warping-in-metal-3d-prints/)

PiSquare Lets You Run Multiple HATs on a Raspberry Pi
https://hackaday.com/2022/04/13/pisquare-lets-you-run-multiple-hats-on-a-raspberry-pi/

The Raspberry Pi’s venerable 40-pin header and associated HAT ecosystem for upgrades has been a boon for the platform. It’s easy to stack extra hardware on to a Pi, even …read more (https://hackaday.com/2022/04/13/pisquare-lets-you-run-multiple-hats-on-a-raspberry-pi/)

Versatile Reflow Oven Controller Uses ESP32-S2
https://hackaday.com/2022/04/14/versatile-reflow-oven-controller-uses-esp32-s2/

[Maker.Moekoe] wanted a single controller board that was usable with different reflow ovens or hotplates. The result is a versatile board based on the ESP32-S2. You can see a video …read more (https://hackaday.com/2022/04/14/versatile-reflow-oven-controller-uses-esp32-s2/)

Great Beginnings: The Antikythera Mechanism Gets a “Day Zero”
https://hackaday.com/2022/04/14/great-beginnings-the-antikythera-mechanism-gets-a-day-zero/

When an unknown genius sat down more than 2,000 years ago to design and build an astronomical instrument, chances are good that he or she didn’t think that entire academic …read more (https://hackaday.com/2022/04/14/great-beginnings-the-antikythera-mechanism-gets-a-day-zero/)