Hi All...
Started this thread because I was starting to make the meet & greet thread a bit untidy - my apologies.
I have built some useful & some less useful devices in my time.
I guess most people with an engineering background have made a 'death ray', spud gun, Jacob's ladder, or to generalise an object with no meaningful function other than to make other engineers go Oooohh! or Ahhhhh!
My 12V CO2 laser rifle has a divergence of 13.5mrad so will eventually melt a hole in a chocolate teapot at 5 meters and is just about as useful.
With a big beam expander it might be made useful but that bit would cost more $$$ than the rest of the parts and that would be missing the point of the post.
So come on 'fess up an post details & pics of your 'useless' monstrosities.
Robin.