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Post by lamazoid on Jun 10, 2016 11:48:40 GMT -8
Finally, you should do vacuum potting with Epoxy resin. Don't forget to insulate wires, coming from the secondary. I prefer to use Teflon or silicone tube for that. If everything is done right, you will get the working transformer: This picture is jut for good mood, actually Nice spark does not actually mean efficiency. It just indicates, that it is properly insulated and has no tend to internal shorts. Note, that this T2 construction was designed to use with 0.1uF storage cap and 1400V primary voltage (primary spark gap nominal breakdown). Only this configuration guarantees that output pulse will be as described and effective. That's why i've said that you need re-design entire circuit. I think that's enough info for today, waiting for you to comprehend all this, then if you won't change your mind, i will continue
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Post by Nostro on Jun 10, 2016 12:35:22 GMT -8
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Post by Gary Lecomte on Jun 11, 2016 6:13:56 GMT -8
lamazoid Said: Note, that this T2 construction was designed to use with 0.1uF storage cap and 1400V primary voltage (primary spark gap nominal breakdown). Only this configuration guarantees that output pulse will be as described and effective.
However it is Unlikely that Nostro's Stun gun circuit put out that 1400 Volts.
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Post by nostro on Jun 12, 2016 11:24:24 GMT -8
Hi in the blue capacitors says "0.5uf DC 1000v" this recipe of t2 will dont work with my stungun? now i get 2 osciloscopes the problem is I dont know how it works, l will make some investigation
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Post by Gary Lecomte on Jun 12, 2016 14:27:30 GMT -8
Hi in the blue capacitors says "0.5uf DC 1000v" this recipe of t2 will dont work with my stungun? now i get 2 osciloscopes the problem is I dont know how it works, l will make some investigation Are you sure it is 0.5uF, Not 0.05uF? Seems a Bit high for that Physical size and Voltage rating. But Probably not a Problem anyway. It is Doubtful an Oscilloscope will be of Any Help to you. And you could easily Damage the Oscilloscope. Yes his T2 will work, But Maybe Not quite as good as the Original T2. The Only way you will know: Is to get the Ferrite Rod and Wire, than make it. Than Vacuum Pot it and test it in your Circuit. You can also try this, to see if the actual circuit works.If you have a VOLT METER that can measure Up to 1000 Volt, One thing you can do is connect your volt meter across one of those Blue Capacitors. Than put a Battery on it and Turn it on, Just for Few Seconds. If it is Working properly, you should see a HIGH Voltage across that Capacitor. But BE CAREFUL, This High Voltage can KILL YOU if you touch these wires.
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Post by nostro on Jun 12, 2016 19:34:43 GMT -8
Hi in the blue capacitors says "0.5uf DC 1000v" this recipe of t2 will dont work with my stungun? now i get 2 osciloscopes the problem is I dont know how it works, l will make some investigation Are you sure it is 0.5uF, Not 0.05uF? Seems a Bit high for that Physical size and Voltage rating. But Probably not a Problem anyway. It is Doubtful an Oscilloscope will be of Any Help to you. And you could easily Damage the Oscilloscope. Yes his T2 will work, But Maybe Not quite as good as the Original T2. The Only way you will know: Is to get the Ferrite Rod and Wire, than make it. Than Vacuum Pot it and test it in your Circuit. You can also try this, to see if the actual circuit works.If you have a VOLT METER that can measure Up to 1000 Volt, One thing you can do is connect your volt meter across one of those Blue Capacitors. Than put a Battery on it and Turn it on, Just for Few Seconds. If it is Working properly, you should see a HIGH Voltage across that Capacitor. But BE CAREFUL, This High Voltage can KILL YOU if you touch these wires.
The capacitor wires you say?. ok then I will use HV protector gloves here is a picture of the capacitor s33.postimg.org/z13n4vo8u/P_20160612_042753.jpg 0.5uf DC 1000WV says. i will make careful test of this circuit and send you the report. thanks ^^
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Post by lamazoid on Jun 13, 2016 11:02:50 GMT -8
Good quality capacitor with nominal voltage 1000v can easily work up to 1600v. In Russian commercial stun gun circuits, typically a 0.1uf x 1000V EPCOS capacitor is used with 1400v surge arrester, also made by EPCOS. This circuit is mass-produced more than 10 years, with no issues, and almost all manufacturers in Russia use it.
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Post by Gary Lecomte on Jun 14, 2016 7:41:36 GMT -8
Good quality capacitor with nominal voltage 1000v can easily work up to 1600v. In Russian commercial stun gun circuits, typically a 0.1uf x 1000V EPCOS capacitor is used with 1400v surge arrester, also made by EPCOS. This circuit is mass-produced more than 10 years, with no issues, and almost all manufacturers in Russia use it. View AttachmentJust Curious, In this Circuit, What is T1? Physical Size, Wire Gauges, Primary and Secondary Turns? Looking at this guys circuit, it only uses One Power Transistor and No Heatsink. Also Both those .5uF Caps are in Parallel, so actually its 1uF. That require a LOT of current if charging to 1000 Volt. Or it is a VERY SLOW Pulse Rate?
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Post by lamazoid on Jun 14, 2016 10:42:58 GMT -8
Good quality capacitor with nominal voltage 1000v can easily work up to 1600v. In Russian commercial stun gun circuits, typically a 0.1uf x 1000V EPCOS capacitor is used with 1400v surge arrester, also made by EPCOS. This circuit is mass-produced more than 10 years, with no issues, and almost all manufacturers in Russia use it. View AttachmentJust Curious, In this Circuit, What is T1? Physical Size, Wire Gauges, Primary and Secondary Turns? Looking at this guys circuit, it only uses One Power Transistor and No Heatsink. Also Both those .5uF Caps are in Parallel, so actually its 1uF. That require a LOT of current if charging to 1000 Volt. Or it is a VERY SLOW Pulse Rate? It's EPCOS 22mm POT core (P series), material is N48. Primary is 4+4 turns of 0.56mm wire wound bifilar; Secondary is 1000turns 0.112mm wire, wound layer-by-layer and heavily insulated. Core has a spacer of about 0.1mm (office paper list). Typical unit construction w looks like this: This circuit is usually powered by 8 Ni-Mh or 2 Li-Po cells, delivering about 30 watts to storage capacitor. (yes, pulse repetition frequency is about 300Hz). Russian stun guns are very powerful, maybe most powerful in the word. The law allows up to 10W output power (measured on output electrodes under 1000 ohm load). For example, taser X-26 has only 1.2W (but very high probe spread when shooting, that's why it does the job). And yes, what Nostro has , is just a "pain" type stun gun (as we call it in Russia) with very low repetition rate and high pulse energy. It has sinusoidal output waveform, something like that: And it's totally ineffective, because it can't cause muscle spasm, only pain, lots of pain. Good for cops, when they have already grab someone (or they can do it without any stun guns), and want to make him "cooperative" But useless for real defense, especially against tough or drunk subjects.
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Post by lamazoid on Jun 15, 2016 1:59:43 GMT -8
closer view of the unit
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Post by Gary Lecomte on Jun 15, 2016 5:17:28 GMT -8
lamazoid, Some difference between this PCB and the Schematic.
What is the 1K0 TRIM POT on the Left Side of that picture? Also a black color Capacitor, between the transistors and T1?
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Post by lamazoid on Jun 15, 2016 10:35:44 GMT -8
lamazoid, Some difference between this PCB and the Schematic. What is the 1K0 TRIM POT on the Left Side of that picture? Also a black color Capacitor, between the transistors and T1? trimpot, orange transistor, few small resistors, and 2-color led, attached by wires, form a primitive battery indication circuit. this is not shown on my schematic above. black thing is 30uH power inductor, wound on ferrite of "|==| " shape (i forgot how it's called in English ))
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Post by lamazoid on Jun 16, 2016 23:31:47 GMT -8
here is some optimization of classic circuit using modern components. my design. it is optimized to run from 8xAAA Ni-Mh batteries, putting out about 30W with almost NO components heat up (and pulse rate decrease, thus) circuit is based on IRLR3636 MOSFET's, gate resistors are 82 and 100 Ohms, 1206 SMD size. Transofmer is wound on RM6 core. Secondary is 800 turns of 0.08 enameled wire, wound on custom 3-section coil former, made on lathe. Primary 2x4 turns of multi-strand teflon insulated wire, with total _cross sectional area_ (not the wire diameter) of 0.07 mm squared. One half of core is regular RM6 N87, with no gap. Other half is AL=400 gapped. (about 0.05mm). This is standart part, EPCOS code B65807J0400J087. Bridge rectifier and T2 shunt chain formed with R5000F and 3xUS1M diodes, respectively. Circuit is mounted on two round shaped PCBs, vertically stacked to each other. Storage cap is glued to T1 with super glue.
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Post by lamazoid on Jun 16, 2016 23:33:02 GMT -8
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Post by Gary Lecomte on Jun 17, 2016 5:36:52 GMT -8
I Like the use of the Mosfets, But it is not practical for me to buy that EPCOS RM6 Core, code B65807J0400J087. And I already have Many Pot Cores.
Thanks for this update.
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