Laser-Engraving Hairlines: When a Line Isn’t a Line
https://hackaday.com/2022/05/29/laser-engraving-hairlines-when-a-line-isnt-a-line/

When is a line not a line? When it’s a series of tiny dots, of course! That’s the technique [Ed Nisley] used to create a super-fine, colored hairline in a …read more (https://hackaday.com/2022/05/29/laser-engraving-hairlines-when-a-line-isnt-a-line/)

Using a Laser Cutter to Replicate an Optical Comparator Screen
https://hackaday.com/2022/05/30/using-a-laser-cutter-to-replicate-an-optical-comparator-screen/

Precision instruments often contain specialized components that are essential to their function, but nearly impossible to replace if they fail. [Andre] had just such a problem with an optical comparator, …read more (https://hackaday.com/2022/05/30/using-a-laser-cutter-to-replicate-an-optical-comparator-screen/)

Check Your Mailbox Using The AirTag Infrastructure
https://hackaday.com/2022/05/30/check-your-mailbox-using-the-airtag-infrastructure/

When a company creates an infrastructure of devices, we sometimes subvert this infrastructure and use it to solve tricky problems. For example, here’s a question that many a hacker has …read more (https://hackaday.com/2022/05/30/check-your-mailbox-using-the-airtag-infrastructure/)

Practical Wireless “Tele-Tennis” Build After Only 34 Years
https://hackaday.com/2022/05/30/practical-wireless-tele-tennis-build-after-only-34-years/

http://searle.x10host.com/TeleTennis/PWTennis.html
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2022/05/Snap-2022-05-28-at-23.04.51-featured.png?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2022/05/Snap-2022-05-28-at-23.04.51-featured.png?w=800">Back in November 1974 the publication “Practical Wireless” produced a five-part article series showing the reader how to construct a version of the popular “pong” game that could be played …read more (https://hackaday.com/2022/05/30/practical-wireless-tele-tennis-build-after-only-34-years/)

An MP3 Player That Gives Off Nintendo Vibez
https://hackaday.com/2022/05/30/an-mp3-player-that-gives-off-nintendo-vibez/

We’re definitely pretty fond of the DIY MP3 players here at Hackaday, but we don’t think we’ve seen one like CartridgeMP3 from [jpet26] before. All the electrical components are what …read more (https://hackaday.com/2022/05/30/an-mp3-player-that-gives-off-nintendo-vibez/)

3D Printing A Water-Cooled Jet Engine?
https://hackaday.com/2022/05/30/3d-printing-a-water-cooled-jet-engine/

https://www.youtube.com/watch?v=FGGw-5dfNiM
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2022/05/Snap-2022-05-28-at-21.42.36.png?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2022/05/Snap-2022-05-28-at-21.42.36.png?w=800">Everybody knows the trick to holding a candle flame to a balloon without it bursting — that of adding a little water before the air to absorb the heat from …read more (https://hackaday.com/2022/05/30/3d-printing-a-water-cooled-jet-engine/)

Can You Build An Industrial grade CNC With Only DIY Resources?
https://hackaday.com/2022/05/30/can-you-build-an-industrial-grade-cnc-with-only-diy-resources/