The average garden dog will play fetch long beyond the average human’s endurance. If you want to keep your dog exercised without hurting your pitching arm, [brankly’s] automatic dog ball …read more (https://hackaday.com/2021/10/18/build-a-dog-ball-launcher-that-kinda-looks-like-a-dog/)

Laser Pointer and Arduino Make a Minimalistic Shooting Game
https://hackaday.com/2021/10/18/laser-pointer-and-arduino-make-a-minimalistic-shooting-game/

Video games are great and all, but sometimes you just want the thrill of manipulating actual objects in addition to watching action on a screen. This must have been the …read more (https://hackaday.com/2021/10/18/laser-pointer-and-arduino-make-a-minimalistic-shooting-game/)

A Microwave Frequency Doubler
https://hackaday.com/2021/10/18/a-microwave-frequency-doubler/

It is an age-old problem. You have a 2.5 GHz source and you want it at 5 GHz. You need a frequency doubler. [All Electronics Channel] has an interesting video …read more (https://hackaday.com/2021/10/18/a-microwave-frequency-doubler/)

POLF: Retro 3D Game Uses Only a Character Display
https://hackaday.com/2021/10/18/polf-retro-3d-game-uses-only-a-character-display/

Got a retrocomputing itch? So does [David Given], and luckily for us all he indulged it by writing POLF: a first-person 3D game for the Commodore PET that uses only …read more (https://hackaday.com/2021/10/18/polf-retro-3d-game-uses-only-a-character-display/)

Drone and High Voltage Spin Up This DIY Corona Motor
https://hackaday.com/2021/10/19/drone-and-high-voltage-spin-up-this-diy-corona-motor/

The average Hackaday user could probably piece together a rough model of a simple DC motor with what they’ve got kicking around the parts bin. We imagine some of you …read more (https://hackaday.com/2021/10/19/drone-and-high-voltage-spin-up-this-diy-corona-motor/)

The PinePhone Pro Is Here. But it’s Still Probably Not The Year Of Open-Source Linux On The Smartphone
https://hackaday.com/2021/10/19/the-pinephone-pro-is-here-but-its-still-probably-not-the-year-of-open-source-linux-on-the-smartphone/

A trope in open source commentary over the last decades has been the phrase “Is this the year of Linux on the desktop?”, as though the open source OS will …read more (https://hackaday.com/2021/10/19/the-pinephone-pro-is-here-but-its-still-probably-not-the-year-of-open-source-linux-on-the-smartphone/)

The Low-Down on Long-Wave: Unlicensed Experimental Radio
https://hackaday.com/2021/10/19/the-low-down-on-long-wave-unlicensed-experimental-radio/

In the 125 years since Marconi made his first radio transmissions, the spectrum has been divvied up into ranges and bands, most of which are reserved for governments and large …read more (https://hackaday.com/2021/10/19/the-low-down-on-long-wave-unlicensed-experimental-radio/)