There are a ton of Bluetooth speakers on the market. Just about none of them have any user-serviceable components or replacement parts available. When they break, they’re dead and gone, …read more (https://hackaday.com/2025/07/24/teufel-introduces-an-open-source-bluetooth-speaker/)

Supersonic Flight May Finally Return to US Skies
https://hackaday.com/2025/07/24/supersonic-flight-may-finally-return-to-us-skies/

After World War II, as early supersonic military aircraft were pushing the boundaries of flight, it seemed like a foregone conclusion that commercial aircraft would eventually fly faster than sound …read more (https://hackaday.com/2025/07/24/supersonic-flight-may-finally-return-to-us-skies/)

KeyMo Brings a Pencil to the Cyberdeck Fight
https://hackaday.com/2025/07/24/keymo-brings-a-pencil-to-the-cyberdeck-fight/

Computers and cellphones can do so many things, but sometimes if you want to doodle or take a note, pencil and paper is the superior technology. You could carry a …read more (https://hackaday.com/2025/07/24/keymo-brings-a-pencil-to-the-cyberdeck-fight/)

2025 One Hertz Challenge: 555 Timer Gets a Signal From Above
https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/

One of the categories we chose for the One Hertz Challenge is “Could Have Used a 555.” What about when you couldn’t have, but did anyway? The 555 is famously …read more (https://hackaday.com/2025/07/24/2025-one-hertz-challenge-555-timer-gets-a-signal-from-above/)

Painting in Metal with Selective Electroplating
https://hackaday.com/2025/07/24/painting-in-metal-with-selective-electroplating/

Most research on electroplating tries to find ways to make it plate parts more uniformly. [Ajc150] took the opposite direction, though, with his selective electroplating project, which uses an electrode …read more (https://hackaday.com/2025/07/24/painting-in-metal-with-selective-electroplating/)

Comprehensive Test Set Released For The Intel 80286
https://hackaday.com/2025/07/24/comprehensive-test-set-released-for-the-intel-80286/

Remember the 80286? It was the sequel to the 8086, the chip that started it all, and it powered a great number of machines in the early years of the …read more (https://hackaday.com/2025/07/24/comprehensive-test-set-released-for-the-intel-80286/)

When the UK’s Telephone Network Went Digital With System X
https://hackaday.com/2025/07/24/when-the-uks-telephone-network-went-digital-with-system-x/

The switch from analog telephone exchanges to a purely digital network meant a revolution in just about any way imaginable. Gone were the bulky physical switches and associated system limitations. …read more (https://hackaday.com/2025/07/24/when-the-uks-telephone-network-went-digital-with-system-x/)

Not Repairing an Old Tape Recorder
https://hackaday.com/2025/07/24/not-repairing-an-old-tape-recorder/