Picture of Incline-activated Fireball Shooter
I needed a Christmas gift for a friend who dabbles in magic.  Being an avid Make magazine follower, I thought Kipkay's excellent instructable would be perfect starting point.

Please note, the recipient of this shooter is an adult who respects fire.  The following has none of the safeties/niceties you might expect from professional-grade equipment.  I recommend you do NOT make this unless you are an adult with at least a smattering of common sense.

The idea was to make something he could hide up his sleeve to produce a flash effect at will without doing something as obvious as pressing a button.  To activate the flash, he just has to raise his hand (which seems to be a natural movement if you're about to shoot fire from it).

 I needed:
  • 1 single AA battery holder
  • 1 mercury switch
  • 1 slide switch
  • 1 1.5V glow plug
  • some Velcro
  • about 4 " of 1/2" thin-walled aluminum tubing
  • small piece of 1/4" plywood
  • flash paper
  • flash cotton

I got the tubing and glow plug at a local hobby store.  The mercury switch came from Radio Shack about 20 years ago.  The battery holder came from the Source.  The slide switch came from a defunct Godzilla noisemaker.  The flash paper and flash cotton came from the internet.  The other stuff I had lying around.

fuzzwuzzle4 years ago
As the recipient of this particular present I have to say that it works great for exactly the one time shock that you need it for. It conceals up a sleeve very well and the switch on the end means that you don't need to remove it or expose it to shut it off. One of the best presents ever buddy, and they eyebrows will grow back, fire respecting adult indeed. (kidding, of COURSE I'm being careful)
glassgiant (author)  fuzzwuzzle4 years ago
Merry Christmas, Shaggy. :)
Frogz4 years ago
aw, when i saw this on hackaday.com i had thought it was using a liquid or gaseous fuel, not flash paper :(
your design needs some improvments
try a spst switch from a microwave(or elsewhere) so you can press a button that'll return to off when it's fired
have a row of 4 of them, 1 for each finger(because everyone knows humans only have 4 fingers) so you arnt limited to 1 shot and if you try to reload too fast, having it explode in your hand http://www.dave-cushman.net/shot/ducksfoot.html
obviously each would have it's own glowplug, you probably could only shoot 1 at a time(aas only provide so much current) but add ATLEAST 1 more barrel
glassgiant (author)  Frogz4 years ago
Hey Frogz,
Yes, it could be improved further, but a NO SPST wouldn't work well. I wanted hands-free activation (hence the mercury switch). Maybe a rotary selector switch with multiple tubes. The glow plug staying on isn't really a problem. And it cools down quicker than anyone could possibly reload it. I went with Flash paper for safety.
glassgiant (author) 4 years ago
Yes, it's hazardous. Kids, ask your parents. Parents, don't be stupid. :)
lemonie4 years ago

Looks hazardous - but also very good.