Instructables
i've come up with a project that i've been contemplating for a long time. It's a flash grenade made from a disposable camera circuit and a part of a pringles can.

You need:
MATERIALS:
-one safety switch, toggle or otherwise, with on/off (for convinience)
-a pringles can (can be one of the snack size or larger type, i cut down a larger type one)
-a camera flash circuit
-various bits of wire, in total not even a foot, but it's good to have extra.
-a motion/impact switch (i jerry rigged one up out of a grommet, a wire nail, and a bit of wire and solder)
-AA battery holder case thing

TOOLS:
solder
soldering iron or pencil
knife or scissors
pliers (or your hands, doesn't really matter)
duct tape
 
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Step 1: Remove circuit, attach safety

rst extract the circuit and short the capacitor by touching the two wires with a screwdriver or a bit of wire. remove the battery and short it again to be sure. This is a relatively simple process, as all it requires is the addition of a safety switch and the motion/impact switch.
Once you have your circuit discharged, you can begin work.
First switch is the safety switch.

Take your toggle switch and one end of the battery holder, preferrably the forked end (+ end) and solder one contact of the switch onto it by a bit of wire. then, attach the other contact to your battery ( i don't know how smart or dumb this was, as i soldered it in place.) The battery didn't do anything to me, it didn't explode, but in hindsight, i assume this was an unsafe decision. Attach the battery to the wire with elecrical tape or solder a proper battery holder to the original contacts. This creates a safety switch which allows you to cut off power to the grenade so it doesn't accidentally charge and go off, as these circuits are finnicky.
Now take your knife and cut out a hole in the side of your container to fit the switch out the side.

Step 2: Add motion/impact switch, cram in da can!

next is the motion/imact switch. This could be replaced with a proper switch, but i didn't know where i could get one. so i rigged one up. See the long bit of copper bar right next to the cap? well, if you create a contact between that bar and the other metal plate to the right of it (with the flash bulb on top and the cap facing away from you) the flash goes off. so. what i did is soldered a grommet (brass little ring thing) to the bar so it looks like a basket ball hoop. then i took another bit of wire and wrapped it around and soldered it to a little wire nail. this is to add weight and a contact point. then i soldered the other end of the nail-wire to the little metal platform. you now have an operational motion/impact switch. thread the nail end of the wire through the grommet and place it, with a battery inserted into the circuit, into your pringles can, flash bulb up. i had to do a bit of bending to the cap and the motion/impact switch rig to get it to fit.

Now comes the tricky part. You have to get the whole deal inside the pringles can, which can take a lot of tweaking. Once you have it in, the OTHER tricky part rears its head. You have to get the motion switch to work properly by taking the wire nail, and threading it through your grommet so that it doesn't touch it, but will if vibrated enough. this took doing, but i found a spot that works. You'll get it with a bit of tweaking and wire twisting and bending.

Also make sure that your circuit is not completely loose in the can. wad up some duct tape or do something so that it doesn't shake loose every time you drop it. It should be a firm fit when you're done.

Now it is time to test your grenade. Turn the safety switch to ON, take off the cap to your pringles can, and push the charge button on your circuit. Wait for the LED to come on, and turn the safety to "OFF" (you can leave it to ON as a booby trap that when your victim goes to pick it up it flashes again, as well) Then lob in a gentle arc. the flash should go off.

These have practical uses in paintball, and airsoft that i can see.

Note that this is a first design and has its bugs. Fiddling may be necessary. If you come up with an improvement upon my design, give me a mail at maaron@sbcglobal.net. Thanks!
You could turn the thing into a real flash grenade by filling the can with flash powder afterwords. Youd only have to be sure that the aluminum in the flash powder dosent short circuit the capacitor because that would be very very bad... (Note: noone should try this I was kinda just kidding)
it works. the third time i used it the wrap it came off and it turned into a gernade. it blew up and shrapnel went every where. worse yet the cops came and got mad cuz they said i wuz makin gernades which i wuznt really( sorta kinda.........yes)
For Christ Sakes
check spelling.jpg
XD
lol
Sorry to point this out but, "For christ sakes" is not exactlya shining example of proper spelling/grammar either.
thats pretty ironic
Yes, it is! :D
well, sorry to point this out :P but
ibleretort.bmp
Damn, My "Post Images" Are broken
Sorry to point this out;
So youd want a little can full of flashpowder a circit board a short circited capacitor
and various metal fragments going off 2 feet from you? I recomend a flack vest
and a lexan swat riotshild. the whole idea of a flash bang is to incapasitate
you not kill you. DO NOT TRY THIS!
good idea. just put cling wrap ( damn stuff, keeps sticking together when u dont want it 2) aroind it. :)
if you electric taped up all wires and housed the capasitator in a waterproof case eg: a camers pot? it would be safe to keep near flash powder but yea if any shorts ocured it would blast your arm of whitch would not be funy
contact smokebombs would be nice... i have an idea for them, but i dont know if it would work.... try this http.. my idea is posted there

http://www.instructables.com/forum/TVKT06KF2H0OXI6/#CUOBPEEF3KRXIQU
Yah please make a video
Aron3132 years ago
Make a video! I want to see what it does before i go through the trouble of making it.
sanagol2 years ago
look at mine but its made out of a flatend toilet paper role
revolver 042.jpg
mdgnys4 years ago
I want to make an infra-red flash grenade for lazer tag that will copy your gun signal and send it out all over
 I was thinking about bringing a prism to laser tag.... just sitting it on the ground and shooting it.
Soundl like a great idea or put gum on a metal reflector and stick it to the ceiling haha!
put an extremely elaborate series of mirrors everywhere so that you can snipe the guy shooting from the other little balcony by shooting at just the right angle. 
Or put an elaborate series of mirrors, then one dude runs out, baits in another person, and then you go ahead and shoot at the mirrors and it richochets everywhere and kills him!
 you just figure out how to sneak in tons of mirror paint (if that even exists) and paint everything. then just shoot somewhere and it'll hit him.
I like where this is going.
Use Aluminium foil, its removable......
it does exist. I actually looked it up for something completely unrelated and now I'm back here looking at this.
Crome spray paint!
or use a learning ir remote and program it and hold the button down and run around pointing at everyone
thats a really good idea if you make it post an instructable and tell me
Good luck with that, they'll probably ban you from laser tag though.
It would be really cool though and it was just an idea.
dudemanclc3 years ago
My friend made a sound grenade out of a window alarm. its made it get your attention so its a great distraction device for airsoft.
account3r23 years ago
haha i got an idea you could use a timer of some sort then a switch then a couple of flash circuits so you could push the button then throw it.
Articas3 years ago
You could ad some sort of reflector (like a big one not the piddly little one from thr camera) around the bulb and mount it in a pipe to make a flash stick type thing. Sorta like the mind wiper thing from men in black
I love the idea but I dont understand some of your instruction could you be more clear like diagram wise point you arrows please
abbabibble2 (author)  what.the.ph08 years ago
yeh. I can do that... it's kind of hard when paint doesn't seem to be working. I'll do that as soon as i can.
holy CRAP!!!!!!! that look hard to make and powerful flash it can probablly make a person go blind but still it is plane old BEASTINES!!!!!!!!!! or at least thats what it looks like
Colonel884 years ago
IMMA CHARGIN MAH LAZOR!





(This is unodirectional, so if it faces the wrong way, people wont see it. SO it's like a 1/6 chance of landing right if it is a square box.)
Anyone got an idea on how to make one that goes off every time someone walks by it?
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