DIY Laser Projector - Built from an old hard drive
Why the open web links it
A portable laser projector built from an old hard drive, controlled via Arduino and Bluetooth.
Linked by 3 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including tomshardware.com, hackaday.com, makezine.com, techeblog.com.