Expensive Batteries Hide Cheap Tricks
https://hackaday.com/2025/11/23/expensive-batteries-hide-cheap-tricks/

In our modern world full of planned obsolescence helping to fuel cycles of consumerism, the thing that really lets companies dial this up to the max is locked-down electronics and …read more (https://hackaday.com/2025/11/23/expensive-batteries-hide-cheap-tricks/)

Smelly Ultrasound
https://hackaday.com/2025/11/24/smelly-ultrasound/

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/