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Build Your Own Stun Gun

michael posted more than 10 years ago | from the capacitors-are-your-friends dept.

Technology 311

mariox19 writes "Wondering what to do with your disposable camera when you're finished with it? TechTV has an article describing how to reach out and zap someone with a home-made stun gun. I discovered the link via Bruce Schneier's latest Cryptogram, where Schneier half-jokingly warns not to let airport security find out about this, lest (in their 'wisdom') they ban cameras along with nail clippers."

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311 comments

Old news (0)

Anonymous Coward | more than 10 years ago | (#9164319)

this has been known for quite a long time now...

Stun Gun in a Camera... (5, Funny)

whiteranger99x (235024) | more than 10 years ago | (#9164322)

And the best part is that you could zap them and capture the moment. Now there's a Kodak moment!!

Just in case Bruce's site cant handle the load.... (-1, Informative)

mirror_dude (775745) | more than 10 years ago | (#9164389)

Incase Bruce's server goes down I put a mirror here [demonmoo.com]
:-)

MOD PARENT DOWN (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164419)


Karma whoring fucker. Schneier's server won't go down.
Just another karma whoring 7xxK newbie...

Re:Just in case Bruce's site cant handle the load. (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164471)

Hey, it's pigscanfly.ca!

Given the number of troll mods offering mirrors seems to earn you, getting a separate accounts seems like a smart move. ;)

Just for the record (well, off the record I guess since this is AC) I think you're offering a good service. Hopefully if you do it long enough people will start to clue in that it's not troll-fuelled-karma-whoring. Though perhaps in this case not strictly necessary...

I can see the FARK now (5, Funny)

gravyfaucet (759255) | more than 10 years ago | (#9164418)

"Bully breaks student's camera, low voltage hilarity ensues."

Re:I can see the FARK now (-1, Troll)

Anonymous Coward | more than 10 years ago | (#9164608)

Except that a lot of people got tired of Fark's mindless anti-Bush whining AND the anti-Bush advertising Fark gets paid to run, and stopped going to Fark.

fp! (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164323)

fp!

Wow (2, Interesting)

General Sherman (614373) | more than 10 years ago | (#9164324)

I wonder if tasers are ever going to become controlled devices.

Re:Wow (4, Insightful)

LostCluster (625375) | more than 10 years ago | (#9164355)

As the article demonstrates, any time you can get a battery, capacitor, and some wire together, you have the resouces to make a simplistic taser.

I don't know any way they'd be able to regulate those situations, since capacitors of some type are found in nearly every electronic device. Anything that has to have a "flash" of power has a high-voltage capacitor behind it... the cammera flashbulb being the most typical example.

Re:Wow (-1, Troll)

Anonymous Coward | more than 10 years ago | (#9164360)

Wow you're an insightful fucking fucker. Fuck! You fucking know so fucking much about fucking every-fucking-thing, fuck!

PS: Learn to spell "camera", it's in the fucking submission, fuck.

Re:Wow (1)

Short Circuit (52384) | more than 10 years ago | (#9164428)

If you think about it, a small charge is merely painful. A larger charge can be lethal.

I can easily see this becoming regulated. With classifications, depending on the charge stored.

Re:Wow (2, Funny)

Sabalon (1684) | more than 10 years ago | (#9164607)

Now all you people know why Radio Shack used to ask for your name, address and phone number. It's part of a government coverup to track capaciter sales.

Re:Wow (3, Insightful)

irokitt (663593) | more than 10 years ago | (#9164598)

You know, the capacitors in a CRT monitor contain more than enough juice to kill a man. Just something to keep in mind...

Re:Wow (1)

DrEldarion (114072) | more than 10 years ago | (#9164398)

It would be very difficult to control things that are so easily handmade. Just pick up a few components from Radio Shack and you've got a simple stun gun. Even if they SOMEHOW restrict access to the individual components, you can cannibalize just about anything for them (like a digital camera, as this article points out).

Tasers Illigal in New South Wales Australia (0)

Anonymous Coward | more than 10 years ago | (#9164580)

Tasers are illigal in the Australian State of New South Wales.

http://www.legislation.nsw.gov.au/fragview/inforce /act+127+1998+sch.1+0+N [nsw.gov.au]

Re:Tasers Illigal in New South Wales Australia (0)

Anonymous Coward | more than 10 years ago | (#9164613)

This is the section in the Prohibited Weapons Act of New South Wales, from http://www.legislation.nsw.gov.au/fragview/inforce /act+127+1998+sch.1+0+N [nsw.gov.au]

(18) Any hand-held defence or anti-personnel device that is designed to administer an electric shock on contact, such as the Taser Self-Defence Weapon or an electrified brief-case, but not including any such hand-held device that may lawfully be used on an animal in accordance with the Prevention of Cruelty to Animals Act 1979.

1st post! (0)

Anonymous Coward | more than 10 years ago | (#9164325)

i would hate to be blindsided by that camera...

Hmmm (5, Funny)

MikeXpop (614167) | more than 10 years ago | (#9164327)

...Schneier half-jokingly warns not to let airport security find out about this, lest (in their 'wisdom') they ban cameras along with nail clippers
The first rule of Homemade-stun-gun Club is...

Re:Hmmm (1)

Lane.exe (672783) | more than 10 years ago | (#9164602)

Rule 5 or so: Homemade Stun Guns are over when some idiot trys to bring one onto a plane.

All battery devices? (1)

LostCluster (625375) | more than 10 years ago | (#9164329)

About the only way I can think of securing against such a threat would be to ban all battery-operated devices from the plane.

This could be tolerated if some sort of PC functionality were included in seatback entertainment consoles, but since those aren't even found on every plane, I'm going to guess that this would be hell for geek air travelers.

Re:All battery devices? Laptop Display Inverters (2, Informative)

G4from128k (686170) | more than 10 years ago | (#9164375)

About the only way I can think of securing against such a threat would be to ban all battery-operated devices from the plane.

Yep, some backlight inverters for laptops run at over 1000V for firing a cold cathode tube.

Re:All battery devices? Laptop Display Inverters (0)

Anonymous Coward | more than 10 years ago | (#9164503)

I burned a small (0.1mm) but deep hole in my finger once testing an inverter. The insulated tape on the back slipped of, and my finger went right on to the circuit board. It was a 400VAC (very high frequency) invertor. It felt like a blood test prick combined with a sudden electric jolt through my whole arm.

Re:All battery devices? (1)

buffer-overflowed (588867) | more than 10 years ago | (#9164461)

Rofl. There's no such thing as perfect security.

You're always in danger from the terrorists.

Of course, you're statistically more likely to die in an automobile accident, or be executed by your own government. But hey, let's just overstate the actual threat cause we're scared!

Re:All battery devices? (4, Insightful)

UpLateDrinkingCoffee (605179) | more than 10 years ago | (#9164479)

And just what kind of threat does a stun gun pose to deserve such a measure? I mean really, people are always going to be able to do all sorts of harm to others. Trying to attain security by micromanaging everyone's actions is just not a working solution. Sure, it's sensible to ban handguns and large kitchen knives from airlines, but battery operated devices? Nail clippers?? Long fingernails could do more damage than the clipper.

Wow! (0)

Huxley_Dunsany (659554) | more than 10 years ago | (#9164330)

Turn a camera into a stun gun?! That's one cunning stunt!

:-)

Huxley

Old.... (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164331)

They first showed this what, a month ago?

Well... (0)

Anonymous Coward | more than 10 years ago | (#9164335)

Yeah, they might be smart to have people put the cameras in the checked baggage, then.

In the mean time, if we all read this, now we'll know how to zap any terrorists who take over our flights (hint: use the capacitor! charge it up, then discharge it on them... not very hard)

Way back... (5, Funny)

grub (11606) | more than 10 years ago | (#9164337)


In junior high electronic shop class (~1978-79) we'd charge a capacitor up, say "Hey $NAME.." and toss it to the person. Force of habit dictated the person would usually catch it and get a nice suprise.

Re:Way back... (4, Funny)

General Sherman (614373) | more than 10 years ago | (#9164371)

I did the same thing, only even more low-tech. We'd take a styrofoam cup covered in tin foil, charge it with static electricity from a van de graf generator, and toss it to the person.

The trick was not to touch the metal and keep it in another non-covered cup.

Re:Way back... (1)

grub (11606) | more than 10 years ago | (#9164482)


Woo, that's a cool idea... (although calling a vdg generator "low-tech" is kinda funny ;))

Re:Way back... (5, Interesting)

metlin (258108) | more than 10 years ago | (#9164506)

Actually, if you can have any kind of discharge, you can build a primitive coil gun/sten gun.

In my freshman year of EE, we used to build capacitor banks and use them to power our coil guns.

And another thing to do is to use Flyback drivers to discharge and use them to power hi-voltage stuff. Ofcourse, this knowledge came to us much later, but was useful neverthless :)

With a little bit of expertise, you can build a transistor flyback driver in a matter of minutes and do quite a lot of nasty things with it ;)

Actually, if you can have any kind of discharge... (5, Funny)

quonsar (61695) | more than 10 years ago | (#9164566)

...you should see a doctor ASAP.

Re:Way back... (5, Funny)

nomadic (141991) | more than 10 years ago | (#9164585)

I did the same thing, only even more low-tech. We'd take a styrofoam cup covered in tin foil, charge it with static electricity from a van de graf generator, and toss it to the person.

We had it even simpler in NYC public school. We'd shout someone's name, and when they turned around we'd shoot them. Good times.

Re:Way back... (1)

machine of god (569301) | more than 10 years ago | (#9164396)

Psh. Junior high? We still do that now.

Re:Way back... (0)

Anonymous Coward | more than 10 years ago | (#9164413)

If you really want to get burnt, try taking apart a professional camera flashgun. I have made 1 inch sparks with these...

Re:Way back... (1)

metlin (258108) | more than 10 years ago | (#9164593)

I so agree. When I was really young (~10 years) I ripped open an el-cheapo camera and tried building something out of it. Got zapped. That knowledge came in really handy much later when I had access to bigger camera-flashguns ;-)

But if you really want to get hurt, stick your hand up any high-voltage EM generator. I've had really bad RF burn marks from my EM lab from these things.

Or, try getting near a Tesla coil wearing wool :) Those things could kill people.

Re:Way back... (0)

Anonymous Coward | more than 10 years ago | (#9164513)

In junior high electronic shop class (~1978-79)

w0w ... you're old. I wasn't even born then.

Re:Way back... (1, Funny)

Anonymous Coward | more than 10 years ago | (#9164527)


Speak up, sonny. Us 38 year olds can't hear too well, what with your rap music and carousing...

Could they get banned at airports? (5, Interesting)

wheresdrew (735202) | more than 10 years ago | (#9164344)

Sure. Different airports ban different things. On a recent trip from Seoul to Tokyo, I had a pack of Duracell AA batteries confiscated by security at Gimpo airport in Seoul. Not rechargables or anything special like that, just plain alkaline AAs, still in the package.

However, when I was leaving Japan I noticed security at Haneda had no such rules. In fact, you could buy both alkaline and lithium batteries at the shops beyond the security checkpoint there.

I've yet to get an explanation for why plain batteries are considered a security risk.

Re:Could they get banned at airports? (4, Interesting)

LostCluster (625375) | more than 10 years ago | (#9164367)

I've yet to get an explanation for why plain batteries are considered a security risk.

I think you just got it. Batteries represent stored electicity... and they can't exactly trust that the battery's voltage is really what's on the label if you don't have a device that you can show properly operates.

Sure, that's paranoid... but that's what the security people are in the business of doing.

Re:Could they get banned at airports? (5, Funny)

hypergreatthing (254983) | more than 10 years ago | (#9164502)

They should just start banning passengers. If there's no passengers, there's no threat, right?

Re:Could they get banned at airports? (2, Informative)

sploxx (622853) | more than 10 years ago | (#9164542)

Yes, and that is IMHO not absurd. Recent advancements in rechargeable technology get the energy stored per mass unit into the region of chemical explosives. According to various source (google), cell phone batteries have around 165Wh/kg, approx 0.6MJ/kg. TNT has 4GJ/ton, i.e. 4MJ/kg. Now consider the mass of a common laption LiIon battery ...

Re:Could they get banned at airports? (1)

cybermace5 (446439) | more than 10 years ago | (#9164586)

Eh...plus, what guarantee do they have that the batteries are not actually explosives to begin with. They'd have to open and test every battery to be reasonably sure (and even then, there would be ways to get around it). There are lots of ways to hide explosives in seemingly innocent objects.

what ever happened to... (0)

Anonymous Coward | more than 10 years ago | (#9164348)

the air-taser? You know, the one that was supposed to use two UV lasers in parallel to reach out and touch someone...

Great.. (2, Funny)

Anonymous Coward | more than 10 years ago | (#9164349)

all we need now is a follow up article about all the people who killed themselves while making their own stun gun.

Mr Spock (1)

bsDaemon (87307) | more than 10 years ago | (#9164380)

set phasers to "stun"

Re:Mr Spock (0)

Anonymous Coward | more than 10 years ago | (#9164432)

Are you sure that's the stun setting...

-cmh

Only weak in the knees (1)

Cromac (610264) | more than 10 years ago | (#9164356)

According to the article a touch only made the person being shocked weak in the knees, and he's not a very big guy. So while this might be an interesting project and will likely be great fun for some people at frat parties it seems useless as a stun gun.

Re:Only weak in the knees (3, Insightful)

gooberguy (453295) | more than 10 years ago | (#9164383)

True, it wasn't as effective as a normal taser, but with a larger capacitor it could have more than enough zap to stop a person's heart. Also, the victim was shocked on his arm, not his chest or head. I have a feeling a good torso hit would be much more effective.

If you don't... (-1, Troll)

Anonymous Coward | more than 10 years ago | (#9164362)

If you don't mod me, you're a coward.

If you mod me as offtopic, flamebait, or troll, you're a pussy.

Re:If you don't... (-1)

Anonymous Coward | more than 10 years ago | (#9164381)

Oh shit, don't mod me as redundant either.

And whoever modded me as troll:

P
U
S
S
Y.

Go fuck yourself.

Re:If you don't... (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164468)

Whoever modded me overrated,

I never though of that. You sir, are a fucking god.

Woot! (0)

Anonymous Coward | more than 10 years ago | (#9164366)

Something to add to my collection of things I'll never use, but I built it anyways because someone put it up on the web!

I imagine (1, Insightful)

Anonymous Coward | more than 10 years ago | (#9164370)

that anyone who has ever taken a disposable camera apart has experienced this-- and they'd know that it will only make an attacker madder, not "stunned".

Anything new? (1)

AirLace (86148) | more than 10 years ago | (#9164372)

How is this anything special? I remember ripping the capacitors out of a disposable camera, plugging them into a battery and taking the setup to school when I was about ten years old.

The following Kill Bill-esque encounters with sworn playground enemies was a thrill. In fact, that's about when I got some respect for the first time from the 'in crew'.

Don't think this is going to work to well... (5, Informative)

Caeda (669118) | more than 10 years ago | (#9164382)

I suppose its possible that "some" cameras have the right hardware inside to make this. However, personal experience leads me to believe that there are cameras which will deliver just enough shock to piss someone off even more. In fixing a rather nice digital camera a while back, I just happened to touch the wrong wire and... ZAP!!! Ouch? Yes. A knockout? Definately not. Confusing, especially since the batteries werent in the thing. Put it back together, tried it, ended up charing the thing again. Took it apart again. Discovered another wrong spot to touch... ZAP! Equally painful the second time, but still no knockout... That time I ended up throwing the thing in a brief hand spasm which resulted in it landing on my leg and... oh no.. ZAP! That was number 3 and damn I hated that thing but it was still just painful and nothing like a stun gun should deliver. Heck. Not even as bad as picking up a damp laptop battery and having it discharge into you. That'll make your arm numb for hours ;)

Re:Don't think this is going to work to well... (0)

Anonymous Coward | more than 10 years ago | (#9164515)

The caps they use in cameras are called "storage capacitors" even with no batteries/power they can hold a charge. You have to discharge them to not get zapped. On larger devices you can get killed if you don't.

A note to designers the extra 2 cents you might spend including bleeder resistors is alway a good idea.

Re:Don't think this is going to work to well... (0)

Anonymous Coward | more than 10 years ago | (#9164561)

Note to yourself: take batteries out.

real geek protection device... (0)

h00dLuM (630451) | more than 10 years ago | (#9164601)

A naked crt clipped on your belt. Touch it to $PUNK[a]

No User Servicable Parts?!?

Yeah shock the fucker with your camera, or just hit 'em with a bat.

christ...ok next I'll stab him in the eye with the broken arm of my glasses.

bah - here's a project for yah (1, Interesting)

Anonymous Coward | more than 10 years ago | (#9164403)

Wires? In the 21st century, who needs wires?

http://www.geocities.com/Area51/Shadowlands/6583 /p roject431.html

Now off to Ebay for an excimer laser or 2, a white lab-coat, goggles and some nair...

Where's the love? (5, Funny)

sn0wman3030 (618319) | more than 10 years ago | (#9164408)

Did anyone else notice that the URL is http://www.techtv.com/unscrewed/IHATEYOU/story/0,2 4682,3653392,00.html ?

Re:Where's the love? (1, Funny)

Anonymous Coward | more than 10 years ago | (#9164446)

See!

There is a direct connection between resentiment and weapons

Cattle Prod (4, Informative)

John Hasler (414242) | more than 10 years ago | (#9164423)

Just stop by your local farm store and pick up a cattle prod. Or order one at http://www.redhillgeneralstore.com/prod.htm or one of their many competitors.

Tech TV (0)

Anonymous Coward | more than 10 years ago | (#9164430)

Did anyone see the link for NetBus on the bottom of the page. Talk about being on top of technology

It's called a capacitor :-) (2, Informative)

tvh2k (738947) | more than 10 years ago | (#9164438)

Yeah so the article really just says that the battery in the camera can charge the capacitor, and you can procedure to discharge that capacitor on a grounded person. Big deal.

This is dangerous (5, Informative)

sploxx (622853) | more than 10 years ago | (#9164439)

Yeah, capacitors on slashdot once again :)
But beware that this is really dangerous. I touched a flash capacitor some time ago, 40uF@400V are not really nice. 200uF@600V and I can assure you that you will fly across the room, hopefully surviving the shock. I have several 1uF@10kV caps, and I don'T dare to charge them to > 3kV (LOUD, risk of EMI, some PC failures already because of cap discharges)

Because this is all too destructive, here is a nice modification (I TAKE NO RESPONSIBILITY!!):
Leave the connection to the flash tube intact. Increase the capacity of the HV cap. Add capacitors salvaged from other cameras, or as a very cheap alternative, from PC power supplies.
Check the voltage rating. Often, they're rated at 800uF@200V, if your flash light operates around 200V, connect two of them in series (+ -)(+ -).

You can get nice, very *bright* flashes with this method. Do not add to much or the flash time will explode.

Problems here:
- NEVER touch power supply caps, they can store 10x - 20x the energy of flash caps. Lethal!
- Discharge the CAPs from the power supplies before salvaging.
- Discharge the unit after use with an *isolated* gripper, better yet, a high-wattage resistor (few kOhms) hold by an *isolated* gripper.

Someone said that more that more than 10 joule are dangerous, but I think you should not set an upper bound for harmless capacitors.

PS. Someone told me that you have to drink much liquid after an electric shock. Because it removes toxic products from your body which could result in kidney failure or so. Maybe the medicine-studying /.ers know more?
But... better don't let this happen!

Re:This is dangerous (1)

tvh2k (738947) | more than 10 years ago | (#9164460)

Why attach them in series? In series capacitance adds as the recipricals 1/(1/C[1] + 1/C[2]) whereas in parallel they add directly (C[1]+C[2]). In other words, capacitance adds the opposite way resistance does in simple circuits.

Re:This is dangerous (1)

sploxx (622853) | more than 10 years ago | (#9164478)

Sorry, my fault. I meant: "If your flashlight operates at around 400V.". You're right, the capacity halves (for two equal caps). But the voltage rating doubles and you do not really want caps exploding in front of your face!

Re:This is dangerous (5, Informative)

ColdWetDog (752185) | more than 10 years ago | (#9164532)

"PS. Someone told me that you have to drink much liquid after an electric shock. Because it removes toxic products from your body which could result in kidney failure or so. Maybe the medicine-studying /.ers know more? But... better don't let this happen

Yeah, not a bright (so to speak) idea. When a significant jolt of electricity runs through your body, it can cause destruction of lots of cells (including those that do important things like regulate heart rhythm). When the cells get fried, the explode. If they're muscle cells (and you have lots of them even if you're a ninety pound weakling), they spill a protein call myoglobin. Too much myoglobin clogs up your kidneys. This isn't a desirable outcome. Since "the solution to pollution is dilution", pushing lots of fluids can help protect the kidneys. This is typical care for an burn patient (electric or otherwise) in a hospital setting. As the old saying goes, "do not try this at home..."

Old school (0)

Anonymous Coward | more than 10 years ago | (#9164441)

I had one of these 12 years ago when I started college. Never zapped anyone with it, but it was sure fun to play with-- blowing holes in sheets of aluminum foil, dropping thin strands of wire across the terminals and watching them vaporize... ah, memories.

fa (1, Funny)

Anonymous Coward | more than 10 years ago | (#9164444)

We're building one RIGHT NOW. I'll post pictures later.

Security? (-1, Flamebait)

Dan East (318230) | more than 10 years ago | (#9164453)

Schneier half-jokingly warns not to let airport security find out about this

I don't know about you, but I would be more concerned about keeping this information from fundamental Islamic extremists than from airport security.

Dan East

Re:Security? (1)

Colonel Cholling (715787) | more than 10 years ago | (#9164522)

I don't know about you, but I would be more concerned about keeping this information from fundamental Islamic extremists than from airport security.

Yeah, a stun gun is WAY more dangerous than a boxcutter.

Re:Security? (1)

the_mad_poster (640772) | more than 10 years ago | (#9164550)

Yea, god forbid they ever hear of capacitors. Because, you know, there aren't any electronics in the middle east.... I'm sure nobody East of Greece has ever gotten shocked by a TV capacitor or anything. Nope, they've never heard of such things.

Slashdotted already (-1, Troll)

Anonymous Coward | more than 10 years ago | (#9164454)

Luckily I took the liberty of preparing a mirror. [www.al.lu]

Thanks (0)

Anonymous Coward | more than 10 years ago | (#9164507)

The main article was slow as heck, good job I stumbled across this.

Awe Man! (3, Insightful)

bedammit (678849) | more than 10 years ago | (#9164465)

Ok Im a photographer and this sucks. Sure I've know about this for years. While we are at it.. we should inform national security about several other things that can be made into dangerous items. Rubber bands (Useful to construct projectiles) Ethernet cable, shoe string, belts, power cables (good for strangling) lighters (duh) alcohol (useful with lighters) coke bottles (useful with lighters) T-shirts (useful with lighters) (If you didnt get the one above Molotov cocktails) hmm I just realized this list can go on and On.. I watched a lot of MacGyver, James Bond and Mr. Wizard BeDammit BeOS is reborn and its called Zeta www.yellowtab.com

Re:Awe Man! (4, Funny)

John Hasler (414242) | more than 10 years ago | (#9164562)

Doesn't everyone getting on an airplane these days have to strip naked, undergo a body-cavity search, and don shackles and an orange jumpsuit with PASSENGER stenciled on the back?

God this sucked. (0)

Anonymous Coward | more than 10 years ago | (#9164473)

Other than jumping a nice arc the device built and tested for Martin (the stupid gangly dork) Sargent's show was pathetic. It would just piss someone off. It's not a threat just a good way to get your shit pounded. Now Seeing "the Swish" threaten Martin with it was good.

The only reason I even saw this show was everything else that was on sucked worse, otherwise "Unscrewed" is a waste of time. As I am recovering from major surgery and have a catheter up my penis for the last 2 weeks the pain of this "Unscrewed" show seemed minor. On the plus side they got all the cancer. Hoping I don't have to watch any more "Unscrewed" in the next four weeks of recovery.

Bottom line you can build a better "taser" with a Fair Radio Sales [fairradio.com] catalog. Or even better by the real thing for 20 bucks at the local (insert ethinic group name here) corner market. The thing they built was a "tickler" many of us built in grade school or Jr. High.

Slashdotting airport security (2, Funny)

thepixelchef (720102) | more than 10 years ago | (#9164475)

Posting it on Slashdot ought to keep it a secret!

er, wait...

--Ben
pixelchef.net [pixelchef.net]

Warning (1)

GarbanzoBean (695162) | more than 10 years ago | (#9164477)

Removing battery doesn't always work. I was disassembling an Epic stylus infinity camera and did remove the battery. There was a capacitor in there though and I got quite a shock.

Re:Warning (0)

Anonymous Coward | more than 10 years ago | (#9164574)

Then discharge it by contact (not to your skin) or
let it sit for a while. It'll discharge itself (depending on the capacity, though).

You'd need something a bit bigger for a stun (0)

Anonymous Coward | more than 10 years ago | (#9164480)

Lots of college engineering classes take apart those one time use cameras. They use the same sort of capacitor for their flash that you'll find in just about any camera. Around 300-500V with a 150 - 300uF capacitor. And since most people aren't very careful you'll hear a lot of screams of '#$%@%#$@!' in the labs. It hurts but it doesn't stun you by any means, in fact you're more likely to get beat up by someone if you use something like that.

Stun guns have a lot more power behind them and use a fairly high frequency pulse to help disable your muscles.

Praise Beaver! (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#9164490)

The Church of Beaver Cleaver

(OFFICIAL DOCUMENTS)
THE FOUNDING AND DOCTRINE
"I THUNK ABOUT IT"
THE CHURCH OF BEAVER CLEAVER

A Modern evolutionary synthesis of religious and political thought as imbodied in WARD CLEAVER and the interpersonal relationships of the Cleaver household

THE ETERNAL TRIAD made up of WALLY, BEAVER and EDDIE

The Supreme Duo made up of WARD & JUNE
THE VISION OF THE SQUARED CIRCLE

On the evening of January 9th, 1981, The two Elders of the CHURCH OF BEAVER CLEAVER, Rev. Elvon Prezton and Rev. Solomon Bombay, at that time two misguided and lazy mugs, were watching Wrestling on cable T.V. and drinking coffee. Just as the American Dream, DUSTY RHOADES was discussing in vivid and glowing terms his next opponent with nationally syndicated wrestling commentator GORDON SOLLIE, the set went blank and started to emit a bright cobalt blue beam of light. The two Elders were held transfixed in the ray and astrally transported into the circuits of the Quasar television where they met with the Prophet LARRY MONDELLO inside a bogus silicon chip.

In the elapsed earth time of 2 minutes, the Prophet showed the Elders every episode of LEAVE IT TO BEAVER including some rare outtakes and imparted both Esoteric and the Exoteric philosophy of WARD. The prophet Larry also revealed the HIDDEN SECRET which is known on earth only by the Elders and can be only hinted at presently because of certain worldwide preparations to be made before the time is right for unveiling.

The Elders found themselves in front of the television with an extremely unpleasent case of sunburn. Although only two minutes had passsed by the clock, they had actually been with the Prophet for 6 years. The Elders finoshed watching Wrestling and began to disassemble the television in search of the chip. Needless to say the chipo was never found and they couldn't put the set back together, so they bought a new one at a Motel furnishing sale. Late that night the Elders drew up the charter of the CHURCH OF BEAVER CLEAVER.
DESCRIPTION AND FUNCTIONS OF THE SUPREME DUO

WARD is the paternal eity. He is the head of the household and is in charge of creating and controlling the social and moral reality constructs. His complementary partner is JUNE, the matriarchal deity. JUNE functions to help maintain the structure of reality and through her intuitive powers spots potential trouble spots. WARD and JUNE are two seperate beings that act as one. They each have certian qualities that the other is lacking and through this combination they have achieved a state of balance.

The SUPREME DUO is represented by two interlocking circles. The circle by it's very nature indicates a complete or whole cycle, or more precisely, the linear expositi9on of an infinite event. The two circles are each shown as possessing a polarity. The shaded areas are where the polarities are integrated and actually become greater than the sume of the two seperate components.

This shaded area (the INTEGRATED POLARITY ELEMENT) is the secret power zone of the SUPREME DUO.

It must be pointed out that there are FIVE conceptual deities and therefore in accordance with the esoteric law of FIVES.
DESCRIPTION AND FUNCTION of the ETERNAL TRIAD

The Eternal Traid should be pictured as a right triangle. The BEAVER is placed in the uppermost angle point. Beaver is the embodiment of the pure man or innocent pure being. In the lower 45 degree angle point is placed EDDIE HASKELL. Eddies role is that of the deceiver, the tempter and in a deeper sense, the essence of evil. Located in the final angle point is WALLY. WALLY acts as a mediator between BEAVER and EDDIE. Because of his close relationship with both, he holds a deep understanding of the intrinsic nature of the BEAVER and EDDIE archetlypes. In the role of older brother his duty is to guide the BEAVER to do the right thing in the face of tempation. In the role of best friend his duty to be both advisor and socializing factor to EDDIE. The mathematical formula of the ETERNAL TRIAD is BEAVER 45 degree plus EDDIE 45 degrees equals WALLY 90 degrees (45 + 45 = 90) This is not to imply that WALLY is in any way superior to BEAVER or EDDIE but is a matter for a deeper level of consideration.
THE DOCTRINAL LOGO OF THE CHURCH OF BEAVER CLEAVER

The symbolic representation of the SUPREME DUO is two interlocking circles and should be rightly placed above the triangularization of the ETERNAL TRIAD.

DO YOU BELIEVE IN PROSPERITY???
WHAT HAPPENED TO
THE AMERICAN SPIRIT??
DO YOU REMEMBER MORALS??
The CHURCH OF BEAVER CLEAVER answers question to todays problems with it's declaration of the creed;

"I BELIEVE IN THE BEAVE"
BEAVER AND UFO'S!!
-ELECTROMAGNETIC BRAIN SCANS-
WHO REALLY SHOT J.F.K.???
WHAT DID WARD REALLY DO IN W.W. II ??

Ahh, memories of RadioShack... (0)

Anonymous Coward | more than 10 years ago | (#9164491)

Or rather, hooking up capacitors to 12v power supplies the wrong way so they'd butst.

Hey, there was no one in the store for hours at a time - what would you do?

capcaitors aren't full... (3, Interesting)

focitrixilous P (690813) | more than 10 years ago | (#9164499)

I remember when my physics teacher showed us a huge capacitor bank. Chared it up and discharged around a columb to a paper clip. No warning of loudness at all, just asked someone to turn off the lights and BLAM! Dischared! It was pretty cool. If only cameras had such potential. Looks like another weapon is going to be added to my garage armory. (blow gun that shoots nail darts, potato gun, and now this.) I should probably AC this, but let the feds take them away. I can always make more. Unless nails, PVC pipe and paper are banned, that is.

OK... And then what's next...? (1)

demonhold (735615) | more than 10 years ago | (#9164505)

create your own bazooka using a bic ballpen...
personal mines using rat traps...

been there, done that, got the burnt t-shirt (1)

t_allardyce (48447) | more than 10 years ago | (#9164526)

I did this when i was about 14, strapped it onto a crutch and even had an analogue multimeter on the side. Made a nice little cattle prod (inspired by waynes world). I think an evil spider was the only thing to try my patience. Yes most things can be made into a weapon, even bare hands if you have the training. Surely if you just make a separate part of the plane (toilet, bunk etc) for the pilots and ensure the bulky door remains locked at all times then you can be pretty safe. If that means loosing a few square feet of paying seating space and not letting the pilots flirt with the hostess then maybe you gotta make that sacrafice.

I wouldn't do this... (1)

Brianwa (692565) | more than 10 years ago | (#9164536)

From what I've heard, the main capacitor in a normal flash camera carries enough crarge to stop your heart, even if the battery has been disconnected for quite a while. And if you do make one, make sure it never discharges through your chest (don't touch one contact with one hand and the other with your second hand)

Re:I wouldn't do this... (1)

tvh2k (738947) | more than 10 years ago | (#9164569)

even if the battery has been disconnected for quite a while

Well, that depends on how long it's been disconnected for. The voltage (the main item of concern) decreases by the function V=emf*(e^(-t/RC)) where emf equals the electromotive force (a little different than the "voltage") of the battery and "e" is the inverse of the natural log function (e^x). In other words, electric potential across the terminals decreases exponentially.

No...don't...just don't...... (4, Funny)

Beebos (564067) | more than 10 years ago | (#9164548)

Do the universe a favor and do not build your own stun gun. The little sisters and pet dogs of the world will thank you.

Not so new (1)

Xshare (762241) | more than 10 years ago | (#9164549)

We made these at summer camp back in Junior High, not exactly news material. Must be a slow news day. Anyways, if you get a bigger capacitor, the charge is much greater. With a regular one from most camera's, you get barely enough shock to make someone yelp.

I think I speak for everyone here.. (-1, Offtopic)

nineinchnatey (779970) | more than 10 years ago | (#9164567)

Isn't it about time someone finds some naked pictures of Morgan Webb? Come on, I know they exist. There are only so many hours in a day and I haven't found them yet. Gimme a link!

NOT a problem (4, Interesting)

jridley (9305) | more than 10 years ago | (#9164571)

I've gotten whacked with charged flash caps a number of times. It's about enough power to make you jump a bit and shake your hand.
The article talks about "holding it on someone for 5 seconds" - well, that won't do a damn thing; this is a capacitor, it discharges and that's it. There's a charging circuit, but it's very wimpy; it takes the circuit 5 to 10 seconds to put that much energy into a cap for a few millisecond shock.
You want a deterrent? Learn to run fast. You're going to need it, ESPECIALLY if you try to use one of these things.

Talking about idiots at airports... (1)

grepistan (758811) | more than 10 years ago | (#9164577)

Slightly OT, but this [theage.com.au] incident involving stupidity and airport security that happened yesterday may be familiar to some Australian readers.

Zzzzap.. (1)

Brando_Calrisean (755640) | more than 10 years ago | (#9164590)

I remember reading about students in a William Gibson novel (Neuromancer maybe?) fashioning stunguns out of disposable cameras and instantly knew it was possible, thinking back to the time I stuck my finger inside one.. ouch.

Man.... (2, Funny)

ziggy_zero (462010) | more than 10 years ago | (#9164596)

...my dad did this when he was a teenager. For some reason he never taught me how.

Anyway, what I did when I was a teenager was wire up an old shocking pen with two wires, attached it to a telescoping antenna, and made a prong at the end out of a binder clip and two paper clips. I went around pronging everybody.

Ive been doing this. (0)

Anonymous Coward | more than 10 years ago | (#9164599)

I have been doing this , Since I was about 14--im 18 now.

You take them apart, remove the GLASS, and use the two ends that the glass connect to, as your electrodes. If you bend the plastic right, it acts as a little handle.

Nothing new--

i made one too (0)

Anonymous Coward | more than 10 years ago | (#9164600)

I was using a dismantled flash was fun to burn flies and stuff (it was if I recall a 350 microfards capacitor, rated 350V but was charging at 380V).

First time i charged the capacitor and didn't know what to do with it. I gave it to my dad and asked "how do you discharged that?" No fear, he put the 2 terminals flat on a fork, loud bang and there are still 2 visible marks in that fork, years after. The capacitor was like welded to the fork!

So I added some wires and bbqed flies and other insects (even made a bug killing lamp with thin wires around a UV lamp, only they weren't so keen on the uv (black light variety) i used (bastards :)

Anyway, I got another flash and wired the 2 capacitors in // (a 220micro rated 350V... maybe 380 was within specs? dunno) and used the thing across a banana with the electrods quite close together. They litterally sunk into the banana producing loads of smoke and burned flesh.

Only once I got wooshed across my arms and i fell of the chair. 380V continuous is extremely nasty. but i think the burns i saw that day were even nastier. Enough to scar someone for life.

So? Be careful (not scarful ;)

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