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.“
Feb 2012 what is, it and to it at the retin . Cream is to acne age tretinoin you buy online...