The usual solar cell is made of silicon. The better cells use the crystalline form of the element, but there are other methods to obtain electric energy from the sun …read more (https://hackaday.com/2021/11/27/perovskites-understood/)

Ham Radio Gets Brain Transplant
https://hackaday.com/2021/11/27/ham-radio-gets-brain-transplant/

Old radios didn’t have much in the way of smarts. But as digital synthesis became more common, radios often had as much digital electronics in them as RF circuits. The …read more (https://hackaday.com/2021/11/27/ham-radio-gets-brain-transplant/)

Want Octoprint But Lack a Raspberry Pi? Use an Old Android Phone
https://hackaday.com/2021/11/27/want-octoprint-but-lack-a-raspberry-pi-use-an-old-android-phone/

3D printers and Octoprint have a long history together, and pre-built images for the Raspberry Pi make getting up and running pretty easy. But there’s also another easy way to …read more (https://hackaday.com/2021/11/27/want-octoprint-but-lack-a-raspberry-pi-use-an-old-android-phone/)

Magnus Effect Propels This Flettner Rotor Boat
https://hackaday.com/2021/11/27/magnus-effect-propels-this-flettner-rotor-boat/

The Magnus effect is a interesting and useful phenomena. [James Whomsley] from [Project Air] decided to put it to work on a small radio-controlled boat, successfully harnessing the effect. (Video, …read more (https://hackaday.com/2021/11/27/magnus-effect-propels-this-flettner-rotor-boat/)

Another Way to Recycle Those Empty Beverage Cans
https://hackaday.com/2021/11/27/another-way-to-recycle-those-empty-beverage-cans/

Do you ever sit around thinking of ways to repurpose things in your house? Well [BevCanTech] found a way to recycle some of his empty beverage cans by turning them …read more (https://hackaday.com/2021/11/27/another-way-to-recycle-those-empty-beverage-cans/)

Replacement Motherboard Brings New Lease of Life to Classic Thinkpads
https://hackaday.com/2021/11/27/replacement-motherboard-brings-new-lease-of-life-to-classic-thinkpads/

“They don’t make them like they used to.” It might be a cliché, it might not even be entirely true, but there’s something special about owning a piece of hardware …read more (https://hackaday.com/2021/11/27/replacement-motherboard-brings-new-lease-of-life-to-classic-thinkpads/)

This Raspberry Pi Mini ITX Board Has Tons of IO
https://hackaday.com/2021/11/28/this-raspberry-pi-mini-itx-board-has-tons-of-io/

The Raspberry Pi now comes in a wide variety of versions. There are tiny little Zeros, and of course the mainstream-sized boards. Then, there’s the latest greatest Compute Module 4, …read more (https://hackaday.com/2021/11/28/this-raspberry-pi-mini-itx-board-has-tons-of-io/)

It’s Nice Having Someone To Talk To
https://hackaday.com/2021/11/28/its-nice-having-someone-to-talk-to/