All you need to know about lasers…

June 29, 2004 | Link of the Day | By: Mark VandeWettering

I was trying to figure out some details about how laser time of flight sensors determine distance, and Sam’s Laser FAQ came to the rescue. What a terrific resource for geeky hobbyists.

The simplest laser to build from scratch would appear to be a variation of a design from Scientific American’s Amateur Scientist column, but this one requires no glass work and no vacuum apparatus, and can be built for $10 (plus a high voltage power supply).