jchan@aucis.UUCP (Jimmy Chanaga) (06/06/89)
HELLO out there. MY name is Jaime Gabriel Chanaga. I am fourteen years old. I am interested in computers, math, and science. OK stop bugging me. I know what you are thinking. You are wishing you never started reading this article. You are wishing I get to the bottom of my reason for posting this. Ok here it goes. I have the schematics to build a stun gun that delivers 75,000 volts at 25,000 watts from an input of 9.8 volts DC. Now my question is, Is there any way I can conect two of these stun guns in SERIES and get _________ ??? You will have to forgive me for my little knowdledge of electronics. Thanks for taking the time to read this posting. Have a nice day !!!!
jack@csccat.UUCP (Jack Hudler) (06/06/89)
In article <426@aucis.UUCP> jchan@aucis.UUCP (Jimmy Chanaga) writes: >HELLO out there. >MY name is Jaime Gabriel Chanaga. I am fourteen years old. I am interested >in computers, math, and science. OK stop bugging me. I know what you are >thinking. You are wishing you never started reading this article. You are >wishing I get to the bottom of my reason for posting this. Ok here it goes. >I have the schematics to build a stun gun that delivers 75,000 volts at >25,000 watts from an input of 9.8 volts DC. Now my question is, Is there any >way I can conect two of these stun guns in SERIES and get _________ ??? >You will have to forgive me for my little knowdledge of electronics. Thanks >for taking the time to read this posting. Have a nice day !!!! 75kV Volts!!! and at 25kW and even more amazing! 9.8 volts.. if you could get that kind of power and be able to hold it, you'd turn yourself into a little crispy critter! And you want to connect two of these in series?! -- Classic Quotes from STNG: "Pen Pals" Picard: Her society is aware .. that there is intersteller life? Data: No Sir. Picard: Oooops..
ramcte01@ULKYVX.BITNET (06/06/89)
In article <426@aucis.UUCP> jchan@aucis.UUCP (Jimmy Chanaga) writes: > >HELLO out there. >MY name is Jaime Gabriel Chanaga. I am fourteen years old. I am interested >in computers, math, and science. OK stop bugging me. I know what you are >thinking. You are wishing you never started reading this article. You are >wishing I get to the bottom of my reason for posting this. Ok here it goes. >I have the schematics to build a stun gun that delivers 75,000 volts at >25,000 watts from an input of 9.8 volts DC. Now my question is, Is there any >way I can conect two of these stun guns in SERIES and get _________ ??? ^^^^^^^^^ I think the word you are looking for here is "KILLED". Rick McTeague System Programmer Electrical Engineering Department Speed Scientific School University of Louisville Louisville, KY 40292 (502) 588-7020 RAMCTE01@ULKYVX (Bitnet) RAMCTE01%ULKYVX.BITNET@CUNYVM.CUNY.EDU (Internet) {akgua,allegra,cbosgd}!psuvax1!ulkyvx.bitnet!ramcte01 (uucp) Disclaimer: I'm a stand-up comic; if anyone takes me seriously, I'm doing something wrong!
rg20+@andrew.cmu.edu (Rick Francis Golembiewski) (06/07/89)
>wishing I get to the bottom of my reason for posting this. Ok here it goes. >I have the schematics to build a stun gun that delivers 75,000 volts at >25,000 watts from an input of 9.8 volts DC. Now my question is, Is there any >way I can conect two of these stun guns in SERIES and get _________ ??? Humm... if you are drawing 25Kw from a 9.8v DC source then you're going to have to draw 2550 AMPS from your initilal power source! Now that's a heafty supply! Seriously I don't think you're actually going to be able to build such a beast (and if you do, you'll probabily need a truck to move it, unless that 25Kw is a few orders of magnitude off..). I'de advise against trying because high voltage can be deadly, especially when you don't have experience working with Hv, read some of the HV Cap. articles to get an idea. // Rick Golembiewski rg20+@andrew.cmu.edu \\ \\ #include stddisclaimer.h // \\ "I never respected a man who could spell" // \\ -M. Twain //
ssr@cos.com (Dave Kucharczyk) (06/08/89)
In article <426@aucis.UUCP> jchan@aucis.UUCP (Jimmy Chanaga) writes: >I have the schematics to build a stun gun that delivers 75,000 volts at >25,000 watts from an input of 9.8 volts DC. a few questions. where do you get the tractor-trailer sized 9V battery for the thing ? or do you drag around 440 3-phase wires with you ? oh, portable hydro-electric plant, i see. is this like a crowd control device or something ? you know, you set up two screens and as the people pass through them they get fried, like a giant bug zapper, only for people. perhaps you want to start on a little less dangerous project for your first one ? >Have a nice day !!!! i'm afraid i have other plans.
markz@ssc.UUCP (Mark Zenier) (06/08/89)
In article <426@aucis.UUCP>, jchan@aucis.UUCP (Jimmy Chanaga) writes: > I have the schematics to build a stun gun that delivers 75,000 volts at > 25,000 watts from an input of 9.8 volts DC. Now my question is, Is there any > way I can conect two of these stun guns in SERIES and get _________ ??? 25 Kw, but for how long. If you hook two of them in series, you'll probably just get two 75 Kv pulses instead of one. Sounds like a good way to puncture insulation but not much else. Build a Telsa coil, they're all sorts of fun. Pick the right resonant frequency and you get to talk to both the FCC and the Coast Guard. In person. ;-) Mark Zenier uunet!nwnexus!pilchuck!ssc!markz markz@ssc.uucp uunet!amc!
logajan@ns.network.com (John Logajan) (06/08/89)
> >I have the schematics to build a stun gun that delivers 75,000 volts at > >25,000 watts from an input of 9.8 volts DC. > > where do you get the tractor-trailer sized 9V battery for the thing ? Since watts is an instantaneous measure, i.e. power, and not a measure of total energy, it is not impossible or even unlikely to be able to draw 25,000 watts from a storage capacitance ultimately driven by a 9 volt battery. Consider that 75,000 volts applied to 220,000 ohms will cause 330 milliamps -- thus 25,000 watts. It might only be able to do this for a picosecond, but none the less, the initial instantaneous power would in fact be 25,000 watts! Also note that 220,000 ohms is a good approximation of the resistance of the human body (varies widely, but 220k is a good worst case.) -- - John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 - - logajan@ns.network.com / ...rutgers!umn-cs!ns!logajan / john@logajan.mn.org -
raoul@eplunix.UUCP (Otero) (06/08/89)
In article <19134@cos.com>, ssr@cos.com (Dave Kucharczyk) writes: > In article <426@aucis.UUCP> jchan@aucis.UUCP (Jimmy Chanaga) writes: > >I have the schematics to build a stun gun that delivers 75,000 volts at > >25,000 watts from an input of 9.8 volts DC. > a few questions. where do you get the tractor-trailer sized 9V > battery for the thing ? [various scheves described suitable for > powering a small town]... Aaargh. Look, a typical 9-volt battery can put out ~3000 joules per recharge. At 75,000 volts, that will provide 1 second of power at 40 mA. That is more than enough to punch most humans through a wall convulsing with every muscle, including their heart. If resistance across human skin is roughly 10 kohm or more, that 75,000 volts will produce 7.5 amps to dissipate whatever energy the device has stored. Power output will be 1/2 million watts. Now obviously, the device stores energy in some way to produce a 75,000 voltage, so the limit comes from the device energy storage, not the battery. (The internal resistance of the battery prevents draining power that fast directly: if you want, I'll send schematics and models, but you can take my word on it for now). Don't believe me: Fine. Take a 9-volt battery. Connect the leads to an inductor, say 10 uH for safety. The inductor will charge up with current and energy, that current being limited by resistance of the battery and parasitic resistance in the inductor. From a few feet away, with a *wooden* pole, disconnect the leads. Wear glasses, the arc will be small but is sufficient to pop across the length of the leads and fry the mess. -- Nico Garcia Engineer, CIRL Mass. Eye and Ear Infirmary eplunix!cirl!raoul@eddie.mit.edu
henry@utzoo.uucp (Henry Spencer) (06/08/89)
In article <1944@ssc.UUCP> markz@ssc.UUCP (Mark Zenier) writes: >they're all sorts of fun. Pick the right resonant frequency and you >get to talk to both the FCC and the Coast Guard. In person. ;-) Don't forget the FAA, if you hit the aviation frequencies. And if you thought the FCC had no sense of humor...! -- You *can* understand sendmail, | Henry Spencer at U of Toronto Zoology but it's not worth it. -Collyer| uunet!attcan!utzoo!henry henry@zoo.toronto.edu
ssr@cos.com (Dave Kucharczyk) (06/09/89)
In article <752@eplunix.UUCP> raoul@eplunix.UUCP (Otero) writes:
<reply about 1/2 mega-watt pulses and frying inductors deleted>
get a grip.zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff) (06/09/89)
In article <19134@cos.com> ssr@cos.UUCP (Dave Kucharczyk) writes: >In article <426@aucis.UUCP> jchan@aucis.UUCP (Jimmy Chanaga) writes: > >>I have the schematics to build a stun gun that delivers 75,000 volts at >>25,000 watts from an input of 9.8 volts DC. > Both this posting and the replys indicate that we need a sci.electronics.tech group. Nothing was said about HOW LONG this device would produce this power output. Think about it. -- Jon Zeeff zeeff@b-tech.ann-arbor.mi.us Ann Arbor, MI sharkey!b-tech!zeeff
wwg@brambo.UUCP (Warren W. Gay) (06/13/89)
In article <1434@ns.network.com> logajan@ns.network.com (John Logajan) writes: >> >I have the schematics to build a stun gun that delivers 75,000 volts at >> >25,000 watts from an input of 9.8 volts DC. >>... >battery. Consider that 75,000 volts applied to 220,000 ohms will cause >330 milliamps -- thus 25,000 watts. It might only be able to do this >for a picosecond, but none the less, the initial instantaneous power >would in fact be 25,000 watts! >-- >- John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 - You have not taken the internal source resistance into account. When you do, you might find that the *current* is considerably lower. What is the internal resistance of a typical high voltage capacitor that would be used in a "stun gun"? This parameter probably varies with charge, but say a ceramic capacitor is used-- I suspect a very noticable internal resistance, even at full charge. Engineering types -- comments? 73s de VE3WWG
logajan@ns.network.com (John Logajan) (06/14/89)
In article <570@brambo.UUCP>, wwg@brambo.UUCP (Warren W. Gay) writes: > >battery. Consider that 75,000 volts applied to 220,000 ohms will cause > >330 milliamps -- thus 25,000 watts. > > You have not taken the internal source resistance into account. When you do, > you might find that the *current* is considerably lower. > > What is the internal resistance of a typical high voltage capacitor that > would be used in a "stun gun"? Well, unless they aren't making conductors like they used to, I'd say the worst case internal resistance of a hi-V capacitor is on the order of 1/10's of an ohm -- insignificant when compared to the 220,000 ohms of the "target". Do not confuse the dielectric resistance (which is hopefully very high) with the plate/conductor resistance, which can be arbitrarily low. -- - John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 - - logajan@ns.network.com / ...rutgers!umn-cs!ns!logajan / john@logajan.mn.org -
logajan@ns.network.com (John Logajan) (06/14/89)
In private e-mail, someone wrote:
> at 9V you are not going to get 75KV at 25KW, even for a short duration.
Well, I see that they sell 9v batteries that can sustain 500mah @
7.2v average, which is equal to 3.6 watt-hours or 12960 watt-seconds.
Thus, a 9V battery can (in principle) produce 26000 watts for 1/2 second.
Let us assume that we can only get 1/100 (1%) of this power in a
single blast. That is still 5 milli-seconds at 26000 watt.
I don't have the capacitor energy equation handy, so I don't know the
size required to hold the above case, i.e. 130 watt-seconds @ 75KV.
But, can we even tap the energy of the capacitor in 5ms ?
Well, recall that the resistance of the load is on the order of
220,000 ohms. So even if the series inductance was huge, i.e.
1 henry, the pulse shape would reach max voltage in 1/220,000 * 5
seconds, or about 25 micro-seconds.
Thus even at extremely high levels of inductance, we see that the
rise time is insignificant compared to the "energy" discharge time.
Hmm, working backward for the discharge time of 5ms and 220,000ohms
I come up with a capacitor somewhere between .02 and .1 micro-farads.
This is fairly large for 75kv and so it might be a wee bit heavy to
haul around in a stun gun -- but I am not sure of that either.
--
- John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 -
- logajan@ns.network.com / ...rutgers!umn-cs!ns!logajan / john@logajan.mn.org -