My 'stungun' only makes 37v ??i think its the transformer.. .whats the purpose of the diode over the transistor?

 

The diode in parallel with the transistor doesn't do anything. The transistor breaks down when its collector voltage is about +40V. The diode will conduct if the collector goes negative but it never will.

__________________
Uncle $crooge

 

So the diode is like a saftey precaution for the transistor?

 

The diode is not a safty precaution. It is not needed.
The transistor might be zapped by the opposite polarity of a voltage spike.

Maybe the transistor should have a higher voltage rating.

__________________
Uncle $crooge

 

If I was assaulted with the "stungun" that started this thread, I would have to take half a second to decide whether to laugh or break the perpetrator's jaw.
It may well be time to publish MY idea of a stungun. This one will burn out a 600W floodlamp THROUGH a Russian Navy greatcoat.
Quick specification, 60-80 KV initiation at a couple of amps for a VERY short space of time, which ionises the path for a capacitor discharge, 800 microfarads at 1000v.
This is not for use on friends or animals, this is for use on some bugger with a knife or gun who you KNOW is out to kill you.
It is likely that they will not get up again.
I await Nigel's comments before I say any more on this subject.

 

Why not just use a gun if you're going to kill the person? At least with a gun the person could still survive and you won't go to prison for a long time. There is a thing called "excessive force", that is unless you live in Texas...

 

Possession of a gun is a SERIOUS offence in the UK, even the Olympic handgun team aren't allowed to own or use handguns. Gun clubs are allowed to have rifles, but it's VERY seriously administered. The only handguns allowed are ball and powder types, nothing you can load in less than half a week!

However, possession of a stungun is also a serious offence, as is gas or pepper spray.

However, as a martial artist, any attack on your person should be considered life threatening, and your response should be swift and brutal - and completely automatic - it's easier to argue in court later, than on a slab in the morgue.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I had expected Nigel to have advised me not to publish the circuit........

 

A have located a 'Stun Glove' Schematic on the web from a site called The Free Information Society and this thing supposedly packs a 600V punch.
I am unsure if this particular design is already here or not and I claim no credit for it.
Here is the link
http://www.freeinfosociety.com/elect...age.php?cat=11
the actual page is MS word doc so anyone intrested should simply click the link and either open or save the file.

 

Let's have a closer look at the guts of a flash camera. There is an inverter, to charge a fat cap up to 300 volts, a trigger circuit to fire the tube, and the tube itself. Everyone seems to use the inverter and fat capacitor to put 300 volts on a pair of probes. It'll go through a paper bag if you push!
What else can we do with the available bits? Say we take the probes between the + of the capacitor and the hot end of the trigger coil, what then? Well, the 300 volts is still there, but look what happens when we fire the trigger circuit! A 10kv spike! That'll punch a hole through a lot more, and light an arc for the 300 volts to follow, like it does in the flashtube.
If we now take the flashtube, connect the cathode to the trigger coil hot, the anode to the output probe, and wrap a bit of foil round the middle of the glass and ground it, we find that the tube conducts no current until the flash button is pressed, avoiding wasting charge in damp clothing,etc.
Don't have the probes too close together, with more flesh in the way it hurts more.
You can get over 5 joules from a throwaway camera, so this should be treated as a weapon. People have died from less. Have fun!

 

I'm not familar with gun rules around the world...but I'm assuming killing someone with a home brew electrical device that electrocuted someone to death, as compared to killing someone with a conventional weapon (like a knife) wouldn't do so well in court.

The Free Info Society had some neat projects on their site that's for sure, thanks for the link Mercur.

 

6ma can kill you. why do you think gfci receptacles are supposed to trip at 4 ma?

 

Maximum trip time in seconds, T , with current, I, in mA is equal to
T= (20/I)^(1.43)
according to some U.L. standard.

And, @ 60 Hz,
1 mA is barely detectible current
10 mA is painful current
18 mA is the bottom end of the "let go" threshold
100 mA is the bottom end of possibly fatal current

I've heard that currents >4 A clamp the heart from pumping and if the current is stopped quickly enough there's a good chance the heart resumes beating on its own.

BTW, the link below gives specs to check the health of your house's electrical system; knowing these numbers all you need is a DVM, some light loads and some heavy loads [hair dryers or toasters] and a calculator.
http://www.idealindustries.com/media...uctions_v4.pdf

 

This was posted a few years ago, so I'm betting that someone's connected their little sister or the next door neighbour's cat to it by now.

 

hay can any one told me from whare can i get the transformer of this project plz?