We aren’t sure why, but [Lev Chizhov] and some other researchers have found a way to make you smell things by hitting your head with ultrasound. Apparently, your sense of …read more (https://hackaday.com/2025/11/24/smelly-ultrasound/)

Barcodes, “Lasers”, and Fourier Transforms
https://hackaday.com/2025/11/24/barcodes-lasers-and-fourier-transforms/

The Bomem DA3 is a type of Fourier transform spectrometer used for measuring various spectral data and [Usagi Electric] has one. On his quest to understand it he runs down …read more (https://hackaday.com/2025/11/24/barcodes-lasers-and-fourier-transforms/)

The Unexpected Joys Of Hacking an Old Kindle
https://hackaday.com/2025/11/24/the-unexpected-joys-of-hacking-an-old-kindle/

In the closing hours of JawnCon 0x2, I was making a final pass of the “Free Stuff for Nerds” table when I noticed a forlorn Kindle that had a piece …read more (https://hackaday.com/2025/11/24/the-unexpected-joys-of-hacking-an-old-kindle/)

Build Yourself a Medium-Format Camera
https://hackaday.com/2025/11/24/build-yourself-a-medium-format-camera/

Medium format cameras have always been a step up from those built in the 35 mm format. By virtue of using a much larger film, they offer improved resolution and …read more (https://hackaday.com/2025/11/24/build-yourself-a-medium-format-camera/)

Keebin’ with Kristina: the One with the Elegant Macro Pad
https://hackaday.com/2025/11/24/keebin-with-kristina-the-one-with-the-elegant-macro-pad/

Some people are not merely satisfied with functionality, or even just good looks. These persnickety snoots (I am one of them) seek something elegant, a true marriage of form and …read more (https://hackaday.com/2025/11/24/keebin-with-kristina-the-one-with-the-elegant-macro-pad/)

Testing the Survivability of Moss in Space
https://hackaday.com/2025/11/24/testing-the-survivability-of-moss-in-space/

The cool part about science is that you can ask questions like what happens if you stick some moss spores on the outside of the International Space Station, and then …read more (https://hackaday.com/2025/11/24/testing-the-survivability-of-moss-in-space/)

Ultrasonic Cutting on the Cheap
https://hackaday.com/2025/11/24/ultrasonic-cutting-on-the-cheap/

When you think of ultrasonics,  you probably think of a cleaner or maybe a toothbrush. If you are a Star Trek fan, maybe you think of knocking out crew members …read more (https://hackaday.com/2025/11/24/ultrasonic-cutting-on-the-cheap/)

Retrofits Done Right: Physical Controls for Heated Seats
https://hackaday.com/2025/11/24/retrofits-done-right-physical-controls-for-heated-seats/