Most people don’t think too much of vending machines. They’re just those hulking machines that lurk around on train stations, airports and in the bowels of school and office buildings, …read more (https://hackaday.com/2024/02/27/big-candy-is-watching-you-facial-recognition-in-vending-machines-upsets-university/)

Big Chemistry: Hydrofluoric Acid
https://hackaday.com/2024/02/27/big-chemistry-hydrofluoric-acid/

For all of the semiconductor industry’s legendary reputation for cleanliness, the actual processes that go into making chips use some of the nastiest stuff imaginable. Silicon oxide is nothing but …read more (https://hackaday.com/2024/02/27/big-chemistry-hydrofluoric-acid/)

Joost Bürgi and Logarithms
https://hackaday.com/2024/02/27/joost-burgi-and-logarithms/

Logarithms are a common idea today, even though we don’t use them as often as we used to. After all, one of the major uses of logarithms is to simplify …read more (https://hackaday.com/2024/02/27/joost-burgi-and-logarithms/)

Underwater Sensor Takes Single Pair Ethernet for a Dip
https://hackaday.com/2024/02/27/underwater-sensor-takes-single-pair-ethernet-for-a-dip/

The 10BASE-T1 Ethernet standard is also known as ‘single pair Ethernet’ (SPE), as it’s most defining feature is the ability to work over a single pair of conductors. Being fairly …read more (https://hackaday.com/2024/02/27/underwater-sensor-takes-single-pair-ethernet-for-a-dip/)

3D-Printed Automated Development Tank For Classic Photo Films
https://hackaday.com/2024/02/27/3d-printed-automated-development-tank-for-classic-photo-films/

[packetandy] had a problem. He was still into classic analog photography, but local options for development were few and far between. After some frustration, he decided to take on the …read more (https://hackaday.com/2024/02/27/3d-printed-automated-development-tank-for-classic-photo-films/)

Wireless Telescope Guidance You Can Build On The Cheap
https://hackaday.com/2024/02/27/wireless-telescope-guidance-you-can-build-on-the-cheap/

Telescopes are fun to point around the sky, but they’re even better when you have some idea of what you’re actually looking at. Experienced sky-gazers love nothing more than whipping …read more (https://hackaday.com/2024/02/27/wireless-telescope-guidance-you-can-build-on-the-cheap/)

Blast From the Past: Schematic Templates
https://hackaday.com/2024/02/27/blast-from-the-past-schematic-templates/

If you want to draw schematics today, you probably sit down at your computer. Why not? There are a ton of programs made to do the work easily, and the …read more (https://hackaday.com/2024/02/27/blast-from-the-past-schematic-templates/)

Wire Wrap Odyssey: a 7400-series Homebrew 8-bit Computer
https://hackaday.com/2024/02/27/wire-wrap-odyssey-a-7400-series-homebrew-8-bit-computer/