https://commons.wikimedia.org/wiki/File:2018080707_Bedienelemente_und_Kassettenfach_GPO_Brooklyn_2018.jpg
" data-image-caption="Front panel of a GPO Brooklyn with cassette player (Credit: VSchagow, Wikimedia)
" data-medium-file="https://hackaday.com/wp-content/uploads/2025/01/2018080707_Bedienelemente_und_Kassettenfach_GPO_Brooklyn_2018.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2025/01/2018080707_Bedienelemente_und_Kassettenfach_GPO_Brooklyn_2018.jpg?w=800">Much has been written about the demise of physical media. Long considered the measure of technological progress in audiovisual and computing fields, the 2000s saw this metric seemingly rendered obsolete …read more (https://hackaday.com/2025/01/09/physical-media-is-dead-long-live-physical-media/)

Writing a RISC-V OS From Scratch
https://hackaday.com/2025/01/09/writing-a-risc-v-os-from-scratch/

If you read Japanese, you might have seen the book “Design and Implementation of Microkernels” by [Nu Tian Sheng]. An appendix covers how to write your own operating system for …read more (https://hackaday.com/2025/01/09/writing-a-risc-v-os-from-scratch/)

Retrotechtacular: Soldering the Tek Way
https://hackaday.com/2025/01/09/retrotechtacular-soldering-the-tek-way/

For a lot of us, soldering just seems to come naturally. But if we’re being honest, none of us was born with a soldering iron in our hand — ouch! …read more (https://hackaday.com/2025/01/09/retrotechtacular-soldering-the-tek-way/)

Toner Transfer, but Not for PCBs
https://hackaday.com/2025/01/09/toner-transfer-but-not-for-pcbs/

It is old news that you can print PCB artwork on glossy paper and use a clothes iron to transfer the toner to a copper board, which will resist etchant. …read more (https://hackaday.com/2025/01/09/toner-transfer-but-not-for-pcbs/)

Sheet Metal Forming With 3D Printed Dies
https://hackaday.com/2025/01/09/sheet-metal-forming-with-3d-printed-dies/

Sheet metal is very easy to form, including the pressing in of intricate shapes with dies and a hydraulic press, but the dies themselves are slightly harder to come by. …read more (https://hackaday.com/2025/01/09/sheet-metal-forming-with-3d-printed-dies/)

Engineering Lessons from the Super-Kamiokande Neutrino Observatory Failure
https://hackaday.com/2025/01/09/engineering-lessons-from-the-super-kamiokande-neutrino-observatory-failure/

Every engineer is going to have a bad day, but only an unlucky few will have a day so bad that it registers on a seismometer. We’ve always had a …read more (https://hackaday.com/2025/01/09/engineering-lessons-from-the-super-kamiokande-neutrino-observatory-failure/)

It’s IP, Over TOSLINK!
https://hackaday.com/2025/01/09/its-ip-over-toslink/

At the recent 38C3 conference in Germany, someone gave a talk about sending TOSLINK digital audio over fiber optic networks rather than the very low-end short distance fibre you’ll find …read more (https://hackaday.com/2025/01/09/its-ip-over-toslink/)

A Low Effort, Low Energy Doorbell
https://hackaday.com/2025/01/10/a-low-effort-low-energy-doorbell/