[Kevin] has long wanted to do something musical with a vintage rotary phone and an Arduino, and has finally done so and committed the first of several experiments to HTML …read more (https://hackaday.com/2022/03/15/rotary-phone-midi-controller-still-makes-calls/)

The Nine Dollar Laser Bed
https://hackaday.com/2022/03/16/the-nine-dollar-laser-bed/

A laser cutter bed has to be robust, fireproof, and capable of adequately supporting whatever piece of work is being done on the machine. For that reason they are typically …read more (https://hackaday.com/2022/03/16/the-nine-dollar-laser-bed/)

Layer Line Removal Putty Reviewed
https://hackaday.com/2022/03/16/layer-line-removal-putty-reviewed/

[Teaching Tech] is not alone in hating layer lines in 3D prints and also hates sanding. He recently tried Incredafill putty, a UV-curable putty that you can use to cover …read more (https://hackaday.com/2022/03/16/layer-line-removal-putty-reviewed/)

Linux Fu: Simple Pipes
https://hackaday.com/2022/03/16/linux-fu-simple-pipes/

In the old days, you had a computer and it did one thing at a time. Literally. You would load your cards or punch tape or whatever and push a …read more (https://hackaday.com/2022/03/16/linux-fu-simple-pipes/)

Eight RS232 Ports, One Ethernet Port
https://hackaday.com/2022/03/16/eight-rs232-ports-one-ethernet-port/

When it comes to impromptu enclosures, [Paul Wallace] is a man after our own hearts, for his serial-to-Ethernet converters allowing him to control older test equipment were housed in takeaway …read more (https://hackaday.com/2022/03/16/eight-rs232-ports-one-ethernet-port/)

Our Favorite Things: Binary Search
https://hackaday.com/2022/03/16/our-favorite-things-binary-search/

You might not think that it would be possible to have a favorite optimization algorithm, but I do. And if you’re well-versed in the mathematical art of hill climbing, you …read more (https://hackaday.com/2022/03/16/our-favorite-things-binary-search/)

Spark Plug and Plumbing Parts Bring Nitrogen Laser Under Control
https://hackaday.com/2022/03/16/spark-plug-and-plumbing-parts-bring-nitrogen-laser-under-control/

When it comes to high-speed, high-voltage switching, there are a wealth of components to choose from — MOSFETS, thyristors, IGBTs, and even vacuum tubes like thyratrons. But who needs all …read more (https://hackaday.com/2022/03/16/spark-plug-and-plumbing-parts-bring-nitrogen-laser-under-control/)