netbug

Hi,

Is this transformer (MET-01) suitable for a stun gun ??

http://a1.solidweb.com/ps/wi-tamura/...c?OpenDocument

Thanks,

Pedro

chemelec

No, They are Too Low of Power.

Blueteeth

Hi, I don't want to bring up any moral issues but I feel I should.

I've built a few 'stun-guns' and I still have mixed feelings about the whole issue. For a start some of the design mentioned are not stun-guns. A stun-gun is designed to deliver a high voltage, high current, VERY brief shock. Which, when delivered into the human body causes certain muscles to spasm (the ones close to the bone). This can cause an involuntary movement, loss of balance, and temporary paralysis. Not always pain, a true stungun should not cause any pain.

People probably should remeber how easy this can kill. You shock someone and they fall, hit their head, and thats it. Or their arms fly up, wack you in the face, and break your nose :lol:

The difficult part in designing such a device is how to make it NON-LETHAL. Any idiot can built something that can kill, but making sure the device can never kill, directly by electrical power (not the secondary effects, muscle spasms, falling) is terribly hard.

Cattle Prods however, are designed for pain and incentive.

Most deisgns on the net seem just to create an unrefined, dirty, high votage (and sometimes high current) spike. Which can vary in power, making it dangerous, and quite frankly pathetically amateurish.

The ones I've seen on the net that claim to be stunguns are:

1) The camera flash circuit:
This can quite easily kill. Cameras usually deliver 300-350v from a large capacitor, which, depending on the discharge time, can deliver a few hundred amps. It can burn, make the person jump, and theoretically at least, kill.

2)The 'ol audio transformer with a voltage mulitplier:
These are pretty unimpressive as far as sparks go, but I've shocked myself with one at 5000v. It hurts, really hurts. My version delivered about 6ma (milliamps). Not much, but at 5000v, it can put more than enough current in your heart to stop it.

3) Refined capacitor discharge:
By far the most efficient design for its intended purpose. The is an actual stun-gun operation. Charge a 400v cap (1-4uF) then discharge it through a step-up tranformer to about 25-100kV. Short shock time, so it doesn't burn, and its average power it pretty small (25kW pulse for 50ns, every 0.1s).

I suggest that anyone wanting to build an actual STUNGUN should do their research into the relative voltage and current values the human body can take. I've known many people who say 'its the volts that jolt and the amps that kill' - People who say this know very little about Electricity.
Need I remind anyone about V=IR. where R is the resistance of the body, which we assume is fixed. At 12V, very little current can flow into the human body (uA??). Jack this up to kV and the limit of current flow is down to the power supply. If you build something that CAN deliver 50mA, at 3000V and decide to test it on a friend, buy a black suit :wink:

I'm sorry for nagging, but, why do you want a stungun anyway?
I've seen so many people requesting stungun designs and then not know exactly what they're doing, most of them were under 16, and one even wanted one for his teacher.
I understand the technical interest in the subject, but who really needs a stungun?

I'm done.

Blueteeth.

__________________
Inconsistency is the key to flexibility!

Phasor

I absolutely agree. Enough said.

Someone Electro

Youre right.Most of the pepole dont even need them.

I once made one out of an old 220V/12V transformer and an rele. I got ou to 80 V form it.I was simply bored.These small ones can be fun since they shock at an not dangerus power.

A frend almost fell of the chair wen i unexpectedly shockd him (Good thing he has a sence of humor)

__________________
Il give you shocking experience.

DougTee

I am considered to be a large man in my country. I am 74 inches tall and weigh 98 kilos( I cannot remember know how to conver to pounds). I was an amateur bodybuilder and still have significant muscle mass. I have had a stun gun used on me and it did not knock me down, it was painful, but made me very angry. I respectfully advise that someone that will be using such devices, also have some training in how to control an aggressive opponent. It would be very sad to use such a device thinking you will protect yourself; only to bring further danger to your person. I think that the kubaton is a better approach if you have a resonable amount of upper body strength and arm speed. Blood and broken bone will take the fight out of most men. DT

Areco

I live in a place where stun guns are illigal but want to make one, more for an ignition purpose, I dont have much electronical knowledge but hey thats why im here! I want to build the easiest one and was thinking http://www.armory.com/~rstevew/Publi...Guns/dazer.htm
or
http://www.rlocman.com.ru/am/a06002.htm

If anyone can tell me the basics on stun gun for dummys Id appreciate it also i could use some help finding the parts
http://canada.newark.com seems like my best bet but dont know what parts are the right ones
thanks for the help

Roff

Blueteeth, I agree with you, but you opened yourself up to the question: Why have you made several of them?

Ron

__________________
Ron

chemelec

http://www.armory.com/~rstevew/Public/StunGuns/dazer.htm

***Not a Stun Gun, But yes it will deliver a Shock
or

http://www.rlocman.com.ru/am/a06002.htm

*** Totally Useless

*** Since it Appears your in Canada, You Could Email Me to get the parts.

__________________
I No Longer accept Private Messages on here.
All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\"
or they go Directly to my Junk Mail Folder.
Email me at: chemelec@hotmail.com
Website: http://www3.telus.net/chemelec

Oznog

There is no good reason to build one. It will not be as safe, compact, or effective as a commercial one and as far as projects go it really doesn't teach you much of anything useful that I can see. I mean, the odd case size and shape alone would mean it's something you couldn't carry and wield effectively. Building a nice sparky Jacob's Ladder is a better idea IMHO.

The other thing is stun guns are not really even useful self-defense weapons when properly designed. I saw some friends sitting around the campfire "stunning" each other with one and it wasn't doing much of anything. Self defense instructors readily show that simply blocking the stun gun with an arm will, at best, stun that arm for only a moment while allowing an attacker to clock you upside your head or grab you or the stunner itself with the other arm. The effect doesn't extend much past the point of contact, you must remain in contact, and the area recovers very quickly once it's removed. Basically this is pointless if you don't land a torso hit AND hold it there. The shock value of a crackling stun gun was fearsome when they first came out, now people just laugh at it.

Tasers work better because you can keep applying power as necessary to keep them down. Direct contact units are not useful in this capacity.

Now pepper spray, that stuff takes people down and they usually stay down. And since you can basically hose it at a person it's quite likely to strike the face.

__________________
I thought what I'd do was I'd pretend I was one of those deaf-mutes.

chemelec

I would tend to Disagree. One Main good Reason is It can be very educational in building them and trying to understand the principals involved. Especially the Insulation factors for such High Voltages in a Small Confined Space

Besides, Its just a Minature Telsa Coil. And How many people build them.

Not that I would ever shock anyone with one.
And No I Don't consider it should ever be used as a weapon.

__________________
I No Longer accept Private Messages on here.
All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\"
or they go Directly to my Junk Mail Folder.
Email me at: chemelec@hotmail.com
Website: http://www3.telus.net/chemelec

Oznog

If you're not intending to build something to use as a weapon, you're not building a stun gun. You're building a Jacob's Ladder or whatever, something to make sparks for show. Which actually sounds just fine! As long as you're not making a device intended to apply potentially harmful HV to people nobody's going to object.

It's not a Tesla coil. It's not high freq, not resonant, not air core.

Now making a "solid state Tesla coil" out of a old-style TV flyback and a couple of transistors is a lot of fun. It draws pretty long streamers. It's not an air core but two out of three is probably enough to apply the Tesla name. You can do most of the neat stuff that a Tesla coil can do- light flourescent tubes at a distance, draw streamers without shocking you, etc.

__________________
I thought what I'd do was I'd pretend I was one of those deaf-mutes.

chemelec

[quote="Oznog
It's not a Tesla coil. It's not high freq, not resonant, not air core. [/quote]

I Never said it was a Telsa Coil, but there are definate simularities. No it is not an Air Core, but Yes it definately can be Resonant.

__________________
I No Longer accept Private Messages on here.
All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\"
or they go Directly to my Junk Mail Folder.
Email me at: chemelec@hotmail.com
Website: http://www3.telus.net/chemelec

Roff

Gary, I hate to be picky, but you did say:

__________________
Ron

olly_whinnett

Does anyone know if this 'kubaton' people are referring to is the same as knuckle dusters? How would one go about making this?

Would it be illegal to posess in the UK?