3.6V-6V 700KV High-voltage Generator - Page 1
Forum section: electronics / beginners

author: Kedar264
author_rank: Regular Contributor
timestamp: February 08, 2015, 06:59:10 pm
content: I saw these modules on ebay,http://www.ebay.com/itm/DC-3-6V-6V-700KV-Boost-Step-up-Power-Module-High-voltage-Generator-New-ES-/361127289318I bought one & it works! but if you use carfully . it gives arcs of 3-4 cm and sound ver loud too!!! so i decided to test it whether i can make an emp jammer with it ,it worked fine when i kept output wires near to each other to arc over but when i put them aprt i've noticed ionization process for a minuite and i heared crackling sound which i guess arcing inside between the cock cork walton multiplier stage of it which damaged it ,i can hear the humm noise but not getting any outputi've tried to take it apart but it is as hard as stone which ruined my cutter and screw driverIve bught another and here it is

author: IanB
author_rank: Super Contributor
timestamp: February 08, 2015, 07:01:41 pm
content: Quote from: Kedar264 on February 08, 2015, 06:59:10 pmAh, eBay. Don't you just love it?

author: electr_peter
author_rank: Unknown
timestamp: February 08, 2015, 07:09:37 pm
content: eBay description says not to power for longer than 1 minute. So device meets it's specs.

author: Zero999
author_rank: Super Contributor
timestamp: February 08, 2015, 07:13:19 pm
content: I doubt it can really give 700kV. It if did then you wouldn't be able to stop it from arcing.If you read the description, you'll find it does warn you that operating it open circuit can cause damage to the module, albeit in very poor English:QuoteThis is to be expected as these sorts of high voltage generators are not designed to be operated open circuit.

author: Christopher
author_rank: Frequent Contributor
timestamp: February 08, 2015, 07:16:04 pm
content: I am conducting pre-compliance spike tests, wondering if I can use something like this to charge a capacitor (through a series resistance). Using an appropriate switch and series resistor to discharge quickly into the load?

author: Kedar264
author_rank: Regular Contributor
timestamp: February 08, 2015, 07:18:24 pm
content: is there any way to generate high voltage without damaging generator circuit?

author: Zero999
author_rank: Super Contributor
timestamp: February 08, 2015, 07:24:11 pm
content: There's no need to use a resistor to limit the current. It behaves more like a constant current source, rather than a voltage source. It needs to be protected against open circuit/over voltage rather than short circuit/over current.Add a spark gap to ensure it can't be operated open circuit. Unfortunately the specification doesn't say what the maximum safe voltage is (700kV my arse). A 25mm spark gap would limit the voltage to under 30kV which seems reasonable.

author: Kedar264
author_rank: Regular Contributor
timestamp: February 08, 2015, 07:28:59 pm
content: spark Gapgood idea but i dont want to generate pulsating output

author: IanB
author_rank: Super Contributor
timestamp: February 08, 2015, 07:31:39 pm
content: Quote from: Kedar264 on February 08, 2015, 07:18:24 pmYou have to read the specifications and operating instructions carefully and stay within the limits. Make sure the generator is properly connected to a suitable load before powering it up so that the output current has somewhere to go.

author: Zero999
author_rank: Super Contributor
timestamp: February 08, 2015, 09:05:56 pm
content: Quote from: Kedar264 on February 08, 2015, 07:28:59 pmThere won't be any pulses, so long as the resistance connected to the output is low enough that the voltage drop doesn't exceed the spark over voltage. Look at a spark gap as a protection device, not something which operates continuously.

author: lapm
author_rank: Frequent Contributor
timestamp: February 09, 2015, 09:57:35 am
content: 700KV from small ebay device? Highly dought it...That starts to be enough voltage that insulators need special materials (not cheap)... Old thumb rule i was given that 1 KV will jump 1 mm air gap. So that 4 cm sound more like 40 - 60 KV...How ever actually designing one that can generate 700KV would be fun challenge i think. Mainly because extreme high voltage electricity field and effects its brings into play when design and building one..

author: Stonent
author_rank: Super Contributor
timestamp: February 09, 2015, 10:10:04 am
content: Thanks for helping rebuild our Earth's ozone layer.

author: Kedar264
author_rank: Regular Contributor
timestamp: February 09, 2015, 03:50:47 pm
content: bought smaller version of it and it works very good

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: February 11, 2015, 09:33:15 am
content: When I first started work in 1974 we had immense fun with high voltages. Those were the days when one could not be sacked for doing silly things. We built a Marx Generator, under the bench, which had capacitors made from lengths of PVC drainpipe covered in baking foil. We made a trap for the rats with it but forgot about Gerry, the security guy, who did the rounds at night...!We used to charge up military metal case capacitors and toss them to each other with a shout of "Catch...". One was placed in the boss's jacket pocket and his car keys swapped to the other pocket. We crowded the window as he walked across the car park, then fumbled for his keys... I swear his hair stood up as in a Tom & Jerry cartoon, and both his legs opened like a ballet dancer. Anyway, what was I doing...?

author: Psi
author_rank: Super Contributor
timestamp: February 11, 2015, 09:45:13 am
content: yep, it wont be 700KV that would be large tesla coil territory and be jumping 50-100 cm4cm sounds like 50KV maxThis is a TV flyback and tripler being pushed to within an inch of its life (Tripler died after a few minutes)It's 30kv rated and probably producing 40kv or so.

author: Kedar264
author_rank: Regular Contributor
timestamp: February 12, 2015, 04:45:15 am
content: yes ,i think its not 700kv but certainly in range of 100-200kv.anyway i need to generate sufficient high voltage so that it can ionize the water , to clean it ,so probably trippers doubler wont work (unless we use higher rating components) also they will take lot of space ,so i need to use higher rating component also they need to be separated to prevent internal arcing between the multiplier stages.

author: IanB
author_rank: Super Contributor
timestamp: February 12, 2015, 04:47:03 am
content: Quote from: Kedar264 on February 12, 2015, 04:45:15 amOK, you may want to take a chemistry lesson or two...

author: Kedar264
author_rank: Regular Contributor
timestamp: February 12, 2015, 06:01:08 am
content: Yes ,sure. Do you know any better source for it? And what do you think "does ionization can clean water?

author: Zero999
author_rank: Super Contributor
timestamp: February 12, 2015, 08:45:33 am
content: The short answer is no you can't clean water just by passing electricity through it: look up electrolysis which uses much lower voltages.One way to kill bacteria in water is with UVC light from germicidal lamps.

author: bktemp
author_rank: Super Contributor
timestamp: February 12, 2015, 09:05:52 am
content: Quote from: Kedar264 on February 12, 2015, 04:45:15 amI doubt it is even near that.If you look at other stuff that works at 100kV or more, most of it will be filled with oil. Otherwise you need a large distance and round edges on every conductor.The insulation of those small output wires does not look like anything that can handle more than 50kV.Quote from: Psi on February 11, 2015, 09:45:13 amIt died because of the high currents flowing during each spark. I have killed some tripplers the same way. Adding a esistor to limit the current to <1A helps a lot. Neither the caps nor the diodes used in those multipliers are rated for high peak currents.

author: Kedar264
author_rank: Regular Contributor
timestamp: February 12, 2015, 10:07:30 am
content: OK but take a look at commercially available ionizers which claims that "it can kill bacteria clean water etc.....

author: IanB
author_rank: Super Contributor
timestamp: February 12, 2015, 03:26:24 pm
content: You can ionize air with a high voltage generator, but you can't ionize water the same way. Water is already full of ions. Ordinary water is conductive and will simply short out any kind of high voltage generator and neutralize it.You can sterilize water using UV light from germicidal lamps as Hero999 said.You can also sterilize water with ozone, which can be obtained from an ozone generator. Ozone generators do in fact use high voltages, but there is a bit more involved than just sticking high voltage electrodes in the water.

author: katzohki
author_rank: Frequent Contributor
timestamp: February 12, 2015, 03:34:52 pm
content: There are some companies that make high voltage power supplies professionally. Emco High Voltage, Ultravolt, HVM etc. A lot of them are used for photo multiplier tubes and some other interesting stuff.

author: Kedar264
author_rank: Regular Contributor
timestamp: February 12, 2015, 07:01:19 pm
content: Quote from: IanB on February 12, 2015, 03:26:24 pmAfter reading few things and thishttp://www.epa.gov/iaq/pubs/ozonegen.htmli would say that actually ozone is harmful to health and not effectively clean either air or water.

author: IanB
author_rank: Super Contributor
timestamp: February 13, 2015, 03:01:24 am
content: Quote from: Kedar264 on February 12, 2015, 07:01:19 pmReading and researching to find facts is good!However, there is more to discover, and air and water are different cases. Here are a few other references to look at:http://water.epa.gov/scitech/wastetech/upload/2002_06_28_mtb_ozon.pdfhttp://www.water-research.net/index.php/ozonationhttp://www.lenntech.com/library/ozone/drinking/ozone-applications-drinking-water.htmThat said, the process of disinfecting water is not as simple as just adding ozone. The ozonation process has to be carefully controlled so that the right amount of ozone is added and also that the ozone is effectively dissolved in the water. Secondly the ozonation process produces solid byproducts that normally should be filtered out of the water afterwards.On the other hand, the needs of industrial processes and home chemistry experiments are different. By all means, once you are aware of the dangers of breathing in high concentrations of ozone (don't do that!), do some experiments. Here are a couple of links on simple ozone generators:http://www.bigclive.com/ozone.htmhttp://www.bigclive.com/oz.htm

author: Zero999
author_rank: Super Contributor
timestamp: February 13, 2015, 08:53:26 am
content: Quote from: Kedar264 on February 12, 2015, 07:01:19 pmThe same is true for chlorine which is also used for disinfecting water, both for drinking and in swimming pools. The ozone/chlorine levels are carefully monitored so they're not harmful to health.

author: tiltit
author_rank: Regular Contributor
timestamp: February 14, 2015, 01:12:37 pm
content: Those little modules look really nice for the price.Does anyone know if they could be used to build a small Jacob's ladder? My guess is that they would not provide enough current to sustain an arc. But I could be wrong.I once tried to build a small HV transformers around small a toroid but after an afternoon winding wire, seeing it short out after a minute of use was disappointing. But it did work, sorta...

author: SeanB
author_rank: Super Contributor
timestamp: February 14, 2015, 01:32:22 pm
content: Small neon sign transformer works a lot better at that.A quick one I whipped up one afternoon using just the old NST and some brass brazing wire.