A spectrum visualizer is always a fun project, but we really liked [Yannick99]’s take on it since it uses seven IN-13 Nixie tubes for the display. The tubes, of course, …read more (https://hackaday.com/2022/04/13/nixie-spectrum-display-has-seven-bands/)

The Future Of Energy Storage On Both Sides Of The Meter
https://hackaday.com/2022/04/13/the-future-of-energy-storage-on-both-sides-of-the-meter/

Noor III Solar Tower of the Ouarzazate Power Station, at dusk. (Credit: Marc Lacoste)
" data-medium-file="https://hackaday.com/wp-content/uploads/2022/03/Ouarzazate_Power_Station_Noor_III_Solar_Tower_cropped.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2022/03/Ouarzazate_Power_Station_Noor_III_Solar_Tower_cropped.jpg?w=800">That energy storage is a hot topic is hardly a surprise to anyone these days. Even so, energy storage can take a lot of different forms, some of which are …read more (https://hackaday.com/2022/04/13/the-future-of-energy-storage-on-both-sides-of-the-meter/)

Home Made Stirling Engines From Expedient Materials
https://hackaday.com/2022/04/13/home-made-stirling-engines-from-expedient-materials/

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/