My Homemade 40W LASER SHOTGUN!
Just finished building my 40W(!!!) laser shotgun!!! The output of this laser is complete insanity, and is made up of 8 parallel 5W laser beams totaling to 40W. The parallel beams are manipulated with lenses, sort of like how a choke modifies the spread of a shotgun blast. The massive diode array is powered by a huge lithium polymer battery pack (capable up dumping 250A) and the laser array is regulated by a whopping 24 LM317 drivers.
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...whoa. I wonder how much damage it'd do if you pointed that at a person! Severe burns after long enough I guess.
Seriously, this looks like a ton of fun! But yeah, I wouldn't recommend it being pointed at anyone :D