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Kudos to you for bringing up laser safety! I have been cringing looking at some of these DIY laser projects because even though safety is mentioned it never seems to be stressed. ANY exposure of laser light to the retina causes damage be it direct or reflected, high powered or low powered. The small laser pointers, small little bit of damage but the kicker is it is permanent damage and accumulates over time. It may take a hundred hits to the eyeball to notice, but it is still there.
I see the "know it alls that do nothing's" are out in force on this one. I have actually seen these work. Pretty cool and given enough time and wind they will charge a cell battery. Even though these days there are much better,more efficient, low cost ways to charge things this is still gold if you have access to old muffin fans along with other old computer guts and you are in a pinch....the more you know the better off you will be in any situation, GOOD STUFF!
Another use I found was on my old Datsun 510. The red metal pointing needle on the speedometer metal fatigued and broke after a million years so I could not see how fast I was going. Rather than trying to find a whole new speedometer (do not exist) then tearing the dash out to R&R, I took a skinny red coffee stirring straw slicing it in half lengthwise then carefully glued one of the red straw halves to the rotating speedo indicator post the old needle broke off of making sure not to drip any glue into the rotating post. The speedo worked better with the light weight pointer than it did with the heavy old metal one
Wifi Controlled Roving Webcam!
You had me @both AC AND DC power, at potentially LETHAL voltages. Let me change my underwear now Keymoslobie, my sloppy liTTle friend! Awesome apocalypse survival technique, seriously good stuff
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