2025 Component Abuse Challenge: Boosting Voltage With Just a Wire
https://hackaday.com/2025/10/17/2025-component-abuse-challenge-boosting-voltage-with-just-a-wire/

Switching power supplies are familiar to Hackaday readers, whether they have a fairly conventional transformer, are a buck, a boost, or a flyback design. There’s nearly always an inductor involved, …read more (https://hackaday.com/2025/10/17/2025-component-abuse-challenge-boosting-voltage-with-just-a-wire/)

F/0.38 Camera Lens Made With Oil Immersion Microscope Objective
https://hackaday.com/2025/10/17/f-0-38-camera-lens-made-with-oil-immersion-microscope-objective/

Over on YouTube [Applied Science] shows us how to make an f/0.38 camera lens using an oil immersion microscope objective. The f-number of a lens indicates how well it will …read more (https://hackaday.com/2025/10/17/f-0-38-camera-lens-made-with-oil-immersion-microscope-objective/)

Radio Astronomy in the Palm of Your Hand
https://hackaday.com/2025/10/17/radio-astronomy-in-the-palm-of-your-hand/

When you think of a radio telescope, you usually think of a giant dish antenna pointing skyward. But [vhuvanmakes] built Wavy-Scope, a handheld radio telescope that can find the Sun …read more (https://hackaday.com/2025/10/17/radio-astronomy-in-the-palm-of-your-hand/)

A New Way to Make (Almost) Holograms with Lasers
https://hackaday.com/2025/10/17/a-new-way-to-make-almost-holograms-with-lasers/

The spectrum of laser technologies available to hackers has gradually widened from basic gas lasers through CO2 tubes, diode lasers, and now fiber lasers. One of the newer entries is …read more (https://hackaday.com/2025/10/17/a-new-way-to-make-almost-holograms-with-lasers/)

Channel Surfing Nostalgia Machine
https://hackaday.com/2025/10/17/channel-surfing-nostalgia-machine/

As any generation of people get older, they tend to look back fondly on their formative years when there was less responsibility and more wonder. Even if things have objectively …read more (https://hackaday.com/2025/10/17/channel-surfing-nostalgia-machine/)

Hacking a Banned Chinese Security Camera
https://hackaday.com/2025/10/18/hacking-a-banned-chinese-security-camera/

Over on YouTube [Matt Brown] hacks a Chinese security camera recently banned by the US government. If you didn’t hear about this you can find out more over here: Major …read more (https://hackaday.com/2025/10/18/hacking-a-banned-chinese-security-camera/)

A Solar Oven for Cloudy Days
https://hackaday.com/2025/10/18/a-solar-oven-for-cloudy-days/