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Post by lamazoid on Mar 9, 2008 0:06:47 GMT -8
No, this will not kill. We have conducted a lot of tests. The guns are: - non-legal in Russia; - dangerous and very injuring - not 100% one-shot stopping ( usual 9mm gun has near 65% while stun-pistol has up to 95% efficency) + this pistol utilizes auto-limiting technology which guarantees that person will not be shocked longer than it's neccesary to stop and fall down. Of course there's always a possiblity of lethal case, but it's very small compared to other weapons.
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Post by Gary Lecomte on Mar 9, 2008 6:54:32 GMT -8
Its Impossible to Pre-Determine How Dangerous a Stun Gun is. NO TESTS can do that.
"auto-limiting technology" only Limits Current to a Somewhat safe Level as determined by specific currents. Many persons have died with shocks that are within these safe limits. Last year in Vancouver Canada, the Police killed 4 persons with QUOTE: Safe Stunguns.
Not everyone responds to a shock in the same way! Some Die of the Shock of getting Shocked, Not from the Actual electrical Current.
And it also depends on Where the person gets shocked. Example: Near the heart or on the head is considerably more dangerous.
Either way, Your Responsible for your actions when you shock someone.
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Post by lamazoid on Mar 9, 2008 9:23:47 GMT -8
Yes Gary, you are right.
I should notice that "limiting" in this case means "time limiting" e.g. totally no shock is delivered after person falls. This is new technology invented in Russia. Unlike Taser which utilises electronics to control shock time, this is more simple physical way and iit's NOT dependent from stun gun user. I saw some videos where f$#king american cops fire taser and they shock a person for 5, 10 or more seconds because taser allows that! And that is the main reason of deaths. With russian pistol it's simply impossible. Unfortunately i can't say more about that on public forum, but i can write you by email if interested.
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Post by Deleted on Mar 9, 2008 14:22:52 GMT -8
Anyway both circuits (GARY and LAMAZOID) are correct if you want to experiment and learn. I like the two, one of simple design and the other parties with relatively easy to find. Greetings to GARY and LAMAZOID
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Post by Deleted on Mar 9, 2008 14:35:36 GMT -8
I had broken a stungun gift I have a friend after having played with it. Copy the circuit, I T1 (ferrite core) and T2 (iron core, vacuum potted). The STUNGUN never worked. Worked well t1, but t2 (HV COIL) never work, however the entry T2 produced a strong sound and their discharges were very painful. I really would like to build one that works. I have all the material if someone wants to see him, to ask me.
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Post by lamazoid on Mar 9, 2008 23:04:51 GMT -8
Ivan, can you make some photos of this stuff? Usually, when T1 works and T2 is not this means broken diodes or spark-gap. I think you can repair you stun gun first, then it can be simply upgraded by addition of 1 capacitor and 1 diode.
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Post by Gary Lecomte on Mar 10, 2008 7:56:06 GMT -8
Sometimes its a Bad Spark Gap and sometimes its a Bad T2.
If T2 is Potted Really good, it will Arc Internally, Shorting it out.
(OR if the External spark gap creates a greater voltage than the internal insulation of T2 that it can withstand, T2 shorts out quite quickly.)
A high vacuum epoxy potting helps prevent this by getting insulation throughout the entire transformer windings.
Some wax compounds are fairly good, but some have a high water content. Epoxy is Better than a wax.
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Post by Deleted on Mar 11, 2008 4:00:42 GMT -8
Dear Gary and Lamazoid, thank you for your comments and help. This is the link where are the photos look please, can use the pictures for what you want. rapidshare.com/files/98675338/to_CHEMELEC_and_S_R_CLUB_forum.rar.html I was wrong, the HV coil was not vacuum poted (have air bubbles inside) I will disarm the coil HV and look if shorted inside. Always probe with a spark gap of 6mm (1 / 4 inch), but never produced a spark. And I have no pcb or t1 and t2 I think that attempts again Sorry for my English, greetings from ARGENTINA
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Post by Deleted on Mar 11, 2008 6:36:21 GMT -8
Here is the problem, the coil does not have insulation between layers, it is achieved through vacuum. rapidshare.com/files/98709880/HV_shorting.rar.html After all this time I know what was the problem, now I have to do it again but with a vacuum poted. Gary please, can you tell me how to make vacuum at t2? Using the method LAMAZOID is also good too. When I have time I will again, but the problem I have now is the capacitor .22uf/630v I need greater insulation, 5 x 1uf/630v series is not working ... Well thank you very much and forgiveness by the double post!
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Post by Gary Lecomte on Mar 11, 2008 7:24:19 GMT -8
Here is the problem, the coil does not have insulation between layers, it is achieved through vacuum. rapidshare.com/files/98709880/HV_shorting.rar.html After all this time I know what was the problem, now I have to do it again but with a vacuum poted. Gary please, can you tell me how to make vacuum at t2? Using the method LAMAZOID is also good too. When I have time I will again, but the problem I have now is the capacitor .22uf/630v I need greater insulation, 5 x 1uf/630v series is not working ... Well thank you very much and forgiveness by the double post! A 630 Volt, 0.22uf Capacitor should be OK. There should't be any need to have a Higher voltage one. What is your DC Output woltage after the diodes from T1? Lamazoid method for potted T2 is OK, as long as you have a LOW WATER CONTENT Wax. Before I started using Epoxy for potting Flybacks, The best one I found was Blue in color. But Color has little to do with Water Content. Vacuum Potting is really a problem for most people. I have a Good Vacuum pump that cost about $450.00 Also I have a Custom made Vacuum chamber about 1 Cubic foot in volume and made of 1/2 inch thick Aluminum Plate. It attains a Vacuum of about 29 inches of Hg. I can post a picture of these if you want. Argentina, Interesting: One of the places I was thinking about going to next winter. Youn in summer now, but we are in winter. (Actually just turned to Spring)
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Post by lamazoid on Mar 11, 2008 7:35:55 GMT -8
Well it seems you have 2 problems of geeting this thing to work: - making a good voltage converter - making HV coil As far i can see voltage converter is based on forward topology with relatively low frequency and low power, i think less that 5 watts delivered to main capacitor. And about a watt or less in the total output. I suggest to re-make it completely because you need at least 5 watt out to effectively stop someone. You can use T1 core and make new circuit based on Gary's or my design, depending on power source. Gary's has more stable params and suitable for low-power sources like alkaline batteries. However, for REAL POWER you do need Ni-CD batteries and mosfet inverter. Making HV coil is much more complicated, especially if you do not have special insulation and vacuum. But it's possible if liquid insulator like transformer oil will be used. I've used this method when my stun gun from article got shorted. Here are photos explaining the process: steelrats.net/forum/viewthread.php?forum_id=11&thread_id=253&rowstart=20
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Post by lamazoid on Mar 11, 2008 7:37:46 GMT -8
I'va placed it under moderate heat (from fan) to melt wax and remove it, then oil was filled insted of wax. I've used regular transmission oil found in autoparts store.
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Post by Deleted on Mar 12, 2008 6:35:18 GMT -8
Hello friends ..! GARY: 0.22uf/630v explodes violently throwing pieces around, I think that the DC is more than 1000V, I do not have high voltage meter on my multimeter and I have not a HV adapter for my multimeter.
Lamazoid: you think that my circuit is bad? I want to make a stungun like yours or Gary but here I do not see thoses ferrite cores, and the surge arrester is impossible to find here, and that makes me sad, I try and get out of my country without making shipments abroad by less than U$S 1000. I could never translate well what the oil fill in the HV coil. Instead of the wax-filled oil and heat?
My friend had a number of these guns so long ago, is the owner of a camping goods store. I remember that we operate, it was amazing. Make well the HV coil also would be a powerful stungun (I think) Somebody know of a store that sends sales to Argentina?I need few parts.
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Post by Gary Lecomte on Mar 12, 2008 7:29:17 GMT -8
I'va placed it under moderate heat (from fan) to melt wax and remove it, then oil was filled insted of wax. I've used regular transmission oil found in autoparts store. Car Oil Will work, but Proper Transformer is Better. Biggest problem with oil is it Messy and hard to keep sealed in.
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Post by Gary Lecomte on Mar 12, 2008 7:36:50 GMT -8
I Suggest you Rebuild that first stage so that 630 volt cap will work. There is no reason to need more than 500 volts. Parts? Depends on What parts you want? I can supply the Ferrite Rods and a considerable number of other parts. Shipping to Argentina is not a problem. But for you to pay me, May be a problem. Gary Hello friends ..! GARY: 0.22uf/630v explodes violently throwing pieces around, I think that the DC is more than 1000V, I do not have high voltage meter on my multimeter and I have not a HV adapter for my multimeter. Lamazoid: you think that my circuit is bad? I want to make a stungun like yours or Gary but here I do not see thoses ferrite cores, and the surge arrester is impossible to find here, and that makes me sad, I try and get out of my country without making shipments abroad by less than U$S 1000. I could never translate well what the oil fill in the HV coil. Instead of the wax-filled oil and heat? My friend had a number of these guns so long ago, is the owner of a camping goods store. I remember that we operate, it was amazing. Make well the HV coil also would be a powerful stungun (I think) Somebody know of a store that sends sales to Argentina?I need few parts.
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