WA5ZNU has made a cool version of the Hard Disk Drive Laser Oscilloscope. For all of those going to the Bay Area Maker Faire look out for it since it will be on display!
Via: HG Forum
“A local ham club is privileged to have a table at the SF Bay Area Maker Faire next weekend, and one of the demonstrations we’re doing is oscilloscopes. I’ve built this to help people see mechanically how a scope works. I’m also showing one I’ve built out of chart paper and a ruler.“