High Voltage shenanigans

I thought it was about time to post these videos ive made so i did! my very first forum post!

Topic by The 4th Doctor   |  last reply


Micro High Voltage

I'm going to attempt to make a super micro tesla coil that is 100% contained (unless it runs off of like 12 volts dc, then I'll use a wallwart). Of course, one of the i biggest problem is the power supply. So this is what I'm asking, what's the best way of ramping up the voltage? A tiny toroid transformer? An inductor that gets pulsed? Voltage Multiplier? Something with static electricity? Some type of Inverter? Using Greinacher Cascades? A marx generator hybrid? Other stuff I havn't heard of?

Topic by guyfrom7up   |  last reply


High Voltage Ground

I'm starting to work with high voltages again, but for real this time. I just built an ignition coil driver, using a 555 (and I got an ignition coil), but my 555 broke (the texas instruments ones can only drive 15mA, oppose to the normal 200mA, oops) so I have to go buy one today. My main question is what to use for ground, whether it be for an old screwdriver for arcing sparks or the secondary of a tesla coil. I was originall just going to use the 3rd prong of an outlet, but somewhere on the internet I heard this could destroy all surge protected power strips and destroy all plugged in electronics at your house. I, of course, do not want this cause... well... I'd be screwed. Is this true or not? Can I use the 3rd prong?

Topic by guyfrom7up   |  last reply


phototransistor for high voltage

Before the begining sorry for bad english I want to make laser tag with electric shock when hits This is circuit of taser what I want to do is remove the switch and replace with wire so that the taser can charge automatically then I want to put a phototransistor(that react to red laser) to the poles(where you get shocked when touch them together) but because the both poles are attached to bodies the taser can't be charged so I tried to block one side of pole with phototransistor but when I touch the two poles phototransistor burned(?) and I got shocked in this case what can i do?

Topic by hyeok205   |  last reply


High voltage NOT gate Answered

I am creating a circuit and I need a not gate to run 20 3v 20mA LEDs. The only problem is that to run all of those LEDs (4 series circuits in parallel, if that will help) I am using 18 volts (2 9v batteries in a series). My circuit is compact (,think fitting inside an Altoids container) so a relay wouldn't work. So I need a high voltage way to make a not gate. I can read schematics if that will help you explain it, but I do need you to mention the ohms of the resistor. Thanks a million!

Question by GenAap   |  last reply


High voltage DC voltage doubler? Answered

Is there any kind of high voltage voltage doubler that uses pulsed DC? (Solid state not anything like a Marx)

Question by The MadScientist   |  last reply


High Energy shenanigans

Blowin up small fruits with my capacitor bank, and a little look at my homemade plasma globe hopefully ill add more of a description at some point, feel free to comment and ask questions

Topic by The 4th Doctor   |  last reply


wiring and grounding high voltage transformer?

i need to add another power cord to my HV Transformer it does not look like it has any difference in which way it is wired could i just connect the power cord to it and in the second picture is the screw the ground to the case or can i just gound the case itself to a pole in the ground for example

Question by MonstaM   |  last reply


Ultra simple high voltage generator not working? Answered

 I found the low volt side of the transformer but when I attach the second terminal of the 9v it sparks at the battery and not on the high volt side. Help!

Question by 2tautges   |  last reply


how high is the voltage in the average neon transformer? Answered

I need to know because I may be using one as my power source for my Tesla-coil. 

Question by nerd7473   |  last reply


Why not get high voltage by boosting 300V to say 2KV ?

Hi, I plan to build High Voltage of 4KV. The output current is very low (say 100uA). I intend to use this as focus voltage in a CRT application. Hence, I am exploring the ways to do so. I have seen people building high voltage (8-20KV) using transformer followed by voltage multipliers. Now a days, MOSFETs are available which can withstand voltage upto 4.5KV. So it should be possible to create boost converter which could boost 300V to 2KV. Then one can further boost the voltage using voltage multipliers. The input voltage of 300V is achieved by rectifying the line voltage of 220V/50Hz. Visiting internet, I do not see anybody doing so. Hence I wonder what could be wrong in doing something of this kind. Could somebody elaborate ? Regards, Hardeep

Question by hardeeps   |  last reply



High voltage & marx generator

I'm looking at some instructables, and the simplicity of the cockroft-walton generator is quite interesting. Because I've always been fascinated by lightning and electric sparks (ever since I saw a wimshurst machine as a kid), I was thinking of building a CW generator, to power a small marx generator. Now, I found the parts, but I don't know much about electronics, so I have a few questions, and I was hoping someone here could help me out. 1) For ceramic capacitors, some are labeled for instance '15kV', while others are '15VDC'. I assume the latter only work for DC input, is this correct? 2) If I were to make a CW generator using a few 400V capacitors and a fuse (assuming I don't f*k up putting it together) like this: https://www.instructables.com/id/High-Voltage-Power-Supply-For-Marx-Generator/?&sort;=ACTIVE&l; imit=40&offset;=80 Is there a risk of blowing a fuse in the house, or is that fuse in the setup enough protection? 3) Is there any risk for other electrical devices, like a computer, when I plug this in? 4) I work at a computer repair shop, are there any useful components in power supplies, old screens...? Thanks in advance!

Topic by cgpirre   |  last reply


Where to buy large capacitors for cheap? Answered

Building various things, like tesla coils, railguns, and wire exploding devices, reguires very large capacitors. I need to know where to buy some with high voltage and capacitance rating around 450v and 10000uF.

Question by macgyver603   |  last reply


is it possible to step up a 10 v to 1kv by giving required turns in secondary side of a transformer? Answered

Is it possible to produce very high voltage from a single transformer which having very low input in primary side and large number of windings in secondary? why not?

Question by albiemorkal   |  last reply


oil burner ignition transformer and uses question ? Answered

I recently just got a hold of a Allanson oil ignition transformer, the output voltage is 10,000 volts at 23 ma. the power cord was cut so i have to connect another power cord. what gauge or metal is recommended for the output terminals and can i attach a power switch to the 120 A.C. volt line. i was planning on starting off making a jacobs ladder then later on making a tesla coil after i have worked with high voltage a little bit longer are there any more uses for the high voltage transformer i have  

Question by MonstaM   |  last reply



i need a lightning globe can anyone help me?

One without a light bulb and one thats easy to make

Question by odellcowgirl   |  last reply


1kv to 10kv?

What is the best and/or most simple circuit i can build to convert (300-1000)volts to (6-12)kilo-volts or higher? NB: the input will be output from camera circuit or mosquito swatter ,ranging (300 - 1000 kv )

Question by lu2a   |  last reply


Railgun, High or Low voltage? Answered

Okay so i'm making a railgun, and need to get capacitors. Should i go with the ones in the 300-400 volts range, or somewhere around 15-50 volts? I would rather go low-voltage, as they seem to be alot cheaper.  Also, how would I go about making a charging circuit, schematics would be nice.

Question by LiquidLightning   |  last reply


High voltage lamp driver

I have a high voltage lamp driver that i took out of an old projector, I want to know if i wil be able to make a jacobs ladder or plasma globe with it? It supplies 25kv or 12.5kv on each of the two wires? it was used to power the lamp of the projector and it connected directly with the lamp wires. PLEASE HELP!

Topic by Francoisler 


Parts for a high voltage supply?

I am trying to make a power 100-200kv power supply. I plan to do this by putting the positive output of a 7.5 kv flyback transformer through a cockroft walton multiplier. I have never done something like this before, so I am not completely sure about everything. I plan to make the multiplier with 14-15 stages. I thought that it would be okay to use 10 kv DC 1000pf ceramic disk capacitors in the multiplier. One thing I'm not sure about though is whether or not the flyback outputs DC or AC electricity. I assume it is DC since the input is rectified, but if it still is producing AC then I should probably use 15-20kv rated caps. The main thing is that I don't know what diodes to use. I thought I would use 1N4007 or something similar but the peak reverse voltage is only 1 kv. Does anyone know what type of diode to use, and where to get it at a reasonable price (below $2 per unit preferably)? 

Question by Higgs Boson   |  last reply


High Voltage shenanigans back with avengence

I threw together some more vids with significantly moar powah, enjoy! interesting note about the cd explosion according to my science the edge of the cd was traveling around 420mph i also have another cd explosion vid on my channel but this ones much more impressive

Topic by The 4th Doctor   |  last reply



how to construct 5000 AC to DC CONVERTER?

I have 5000 variable AC voltage. i want to convert 5000 volt variable DC voltage. please tell how to convert? and  components requirements ?

Question by selvakumarcns 


N2 TEA Laser Challenge!

CHALLENGE: To build a functional N2 TEA laser with readily available parts. There are plenty of websites where people describe the laser that they built, but I have never seen anyone on instructables who has done this. Please, just make something! Good luck!

Topic by Xellers   |  last reply


how to run a high voltage motor with low voltage Answered

Hi there, I just wanna know how to run a 12v D.C motor using a 9v battery, is it possible by using  voltage and current doubler circuits? please help me, as i want this knowledge for a project of mine

Question by VivekM12   |  last reply



Which high voltage transformer is better? Answered

I want to make a high voltage power supply that is capable of producing arcs, etc. but I don't know if I should buy http://www.goldmine-elec-products.com/prodinfo.asp?number=G17659 or http://www.goldmine-elec-products.com/prodinfo.asp?number=G17744. Which transformer is more reliable/powerful/easier to get working?

Question by Shagglepuff   |  last reply


How to make a 1-1.5 volt voltage regulator at 15 amps?

Hi, I want to make a high current (15 or 16 amp) voltage regulator that outputs around 1 to 1.5 volts. Does anyone know how this could be done cheaply and easily? I've looked at the 15 amp schematic in the LM338 datasheet (http://www.ti.com/lit/ds/symlink/lm138.pdf  page 11), which uses 3 LM338s in parallel, but I'm pretty sure that takes the minimum output voltage to about 4v, way too much for me. I've looked at using 2n3055 transistor, but it seems like I'd need ridiculous heatsinking and probably fans to avoid thermalling out. I'm thinking of taking my power from an old PSU, 5 v rails, so not too much of a voltage drop, but it's hard to find stuff that can handle these kind of currents. I'm pretty much stumped right now, anyone got any ideas?

Topic by lolkent   |  last reply


Can you drive an ignition coil with 775v?

Can I do that, and then how do I rectify it at that high of a voltage

Question by jj.inc   |  last reply


salt water capacitor question? Answered

Would a pickle jar like this one be able to handle 10,000 volts if i turned it into a salt water capacitor and how can i calculate the capacitance of the jar

Question by MonstaM   |  last reply


Transistors in series

If I were to put transistors in series (and hook up there bases together through proper biasing resistors) would it increase the voltage capacbility of the circuit? I need a way of switching on and off about 1000 volts really fast. for example, would 2 750 volt transistors in series be able to handle 1500 volts or not? just a HV pic from my old, dead NST

Topic by guyfrom7up   |  last reply


How does this CCFL inverter work? Answered

Hello, I have this CCFL (Cold Cathode Fluorescent Light) inverter from a scanner. it powers the scanner light. That's the schematic, but I can't see all the components very good, I'm sure about everything that's noted in the schematic, but I don't know the value of that capacitor between both collectors. It's that brown one from the picture. So the question is: How does this circuit work? I'm still trying to figure out how the transistors switch, it's really weird, because when I try recreating this on my breadbord it doesn't work. And why is the first coil shorted out? What I do know about this is that it has an output voltage (very low current, serveral micro amps) of 2 to 3kV. It also works at a very high frequency, about 30kHz I think, and it has a ferrite core transformer. The primary windings are very thick, and there are about 10 turns. the secondary has Many windings, a few thousand. The primary current is limited by the frequency (Xl = 2*Pi*f*L) so high frequency means high resistance of the coil, and that means a low current. now  how does the switching process work? and what's the use of the brown capacitor?

Question by DELETED_Electorials   |  last reply


Is this the correct way to wire this transformer? Answered

I have a nice little 120VAC to 7.5KV transformer that used to call an air purifier its home, but I'm not sure how to wire it. I have some guesses, but I want to make sure I don't burn down my house so I am hoping to verify them with the help of the instructables community. Here they are:The black and white wires are where you connect the source of 120VACThe green and red wires are the high voltage outputs. (I'm guessing that since this was meant to be a negative ion generator, the green was just connected to ground)You can just connect this to a power outlet and have it run WITHOUT burning down the houseI am not sure if you need a fuse, though.Note : The transformer looks like http://www.goldmine-elec-products.com/images/G1783B.jpg except it also has a green wire.

Question by Shagglepuff   |  last reply


Snubber network? Answered

Although my flyback transformer driver appears to work very well up to 18V operation, the arc length is not satisfactory. I increased the voltage to 25V which allows 2 to 3 inch stable / hot arcs. However my 250V 18A rated MOSFETs appear to fail periodically esp. When adjusting the potentiometers (for adjustments to drive frequency and duty cycle) I Tried sticking a 1N4007 reverse biased diode across but I don't think it changed anything. I still see >300v positive voltage transients. I also tried using a neon lamp without a ballast resistor, but it did not appear to change the waveform, and glows way too brightly. I tried using 3 (really old but giant) 30V zener diodes in series but they latched up, failed, and went up in smoke lol! So clearly these HV transients have a lot of "oomph" behind them. D:  I am reading an article on maxim electronics page about snubbers https://www.maximintegrated.com/en/app-notes/index.mvp/id/848 and I'll experament with some of the circuits presented there but I can't really calculate values needed for the components because I have not characterized my transformer with custom windings and a loose ferrite core. Those things will be subject to change anyways since I do not plan on supplying a specific flyback transformer with this kit. So I want something that is more universally going to work. This high voltage is just  PITA to deal with. How can I reduce it to 200v without hurting performance?

Question by -max-   |  last reply


how to test neon transformers? Answered

I got 4 neon transformers on a dumpster dive. 2 are rated 6000v and 2 are rated 7500v. my multimeter only goes to 750v ac. i have insulated tools (im and electrician) can i just arc the output wires? if anybody is interested in them to build something cool i might be persuaded to give them to you for shipping costs.

Question by dannemillerd   |  last reply


Little help with a part.

OK I dissembled a WWII radar for its gold, silver and parts. I got these Bradley Labs #SE6M82H parts they are 4 inches long and ½ inch in diameter, I may just melt for the silver but before I do I would like to make sure what they are first. I think they are 25,000 to 50,000 volt rectifiers but I can’t get a datasheet or any other information on them. So can anyone help me with information on this part? Joe

Question by Josehf Murchison   |  last reply


Low voltage, high amperage transformer?

Hi! I would like to make, buy, or find, a low voltage high amperage transformer to power an electrolosis cell. I like playing with the hydrogen-oxygen gas produced. From what I have read, I only need about 1.8 volts for electrolosis, so I'd like a circuit or transformer that could take the power from preferable a 9 volt battery and convert it to 1.8v at as high an amperage as I can get. Thanks : )

Question by fozzy13   |  last reply


High voltage transformer current limiting?

I have modified a MOT to output 10kV as a Tesla coil power supply but when testing I found that there was a very low voltage (maybe 2kV). The primary resistance was measured at 0.2ohm much less than the inductive ballast I've used to current limit. Is the voltage being drawn away from the primary to the ballast? If so how can I resolve this (keep in mind even with the ballast it still needs further current limiting)?

Question by The MadScientist   |  last reply


High voltage discharge capacitor help?

I recently got a 50uf 2000 volt polarized pulse discharge capacitor to blow stuff up. I tried to charge it with a microwave transformer rectified by a single HV diode, but that did not work. My plan was to fire up the microwave transformer, close HV switch #1 to charge the cap, open HV switch #1, and turn off the microwave transformer. Then I would close HV switch #2, and would send power to "load", in this case an orange (see diagram). However, when I closed HV switch #1 (which is a nail in a piece of wood and a rod on a PVC pipe), I would get arcs. Then, when I closed HV switch #2, nothing happened. I even tried shorting the cap with a rod, but it had not charged. Before this test, I tested the capacitor by charging it to 120 volts and it worked fine (I got a spark). Also, there is no internal resistor to discarge the capacitor after a long period of time. Should I try a full bridge rectifier with 4 diodes instead of a single diode? I will also include a schematic of the circuit (you might have to zoom in in order to see it).

Question by TimTD   |  last reply


Low Voltage Higher Current?

I am having a strange problem on a USB peripheral.... it is a digital radiography sensor that overheats. I believe it may be due to the power supply to the motherboard, but I don't know for sure. I am ASKING FOR YOUR HELP in reasoning out what may be the cause. Anyone with computer/electronics experience, PLEASE HELP!!! I was told that my power supply is too low voltage, and that current is going up in the USB peripheral causing it to heat up. I always thought V=IR means that if voltage drops so does current. But in other places I read that if voltage drops, current goes up so that the wattage/power usage stays the same according to P=VI. So which is it? V=IR or P=VI ? If my power supply has too low voltage, will the current in the device increase to compensate? Or will it just have a lower current? Does it depend on the circuit and the exact electronics in the USB peripheral? Here is my SETUP. It is SIMPLE: Antec AR-350 power supply connected to a motherboard Asus P5N7A-VM in an ATX case. All I have otherwise is a SATA hard drive and a SATA DVD-ROM in there. That's it! Problem started to happen about 1.5 years after I got the computer. That is why I am thinking maybe it is the power supply, or maybe it is the motherboard?  The computer works fine in every other way! It uses Windows XP and has a wireless keyboard/mouse which also works fine. BIOS settings screen Hardware Monitor shows voltage for USB 5v reading about 4.9v, within tolerance. However, one of my USB peripherals is a digital xray sensor. It works ok a few times, then it starts to overheat and fail. This only happens on this computer. When I use another computer (like a laptop) with the same USB hardware it functions ok and never overheats. I don't have any problems on the other computer, even thought I am using the same software/drivers. I bought a different ATX case with a new power supply, and just moved the motherboard, HD and DVD over. Now the motherboard BIOS shows under Hardware Monitor that it is getting 5.2 V instead of 5v, so it is higher! Also the 12 V is higher (around 12.2v) and same for the 3.3V. All the voltages are HIGHER! So I have yet to test this new configuration with the USB peripheral sensor.  Could the motherboard be faulty? I did notice the motherboard looks "curved" with the area under the CPU sort of bulging out. However, with this motherboard you will see there is a huge heat-sink/fan that gets clamped over the CPU and that may be bending the board. Keep in mind the board works perfectly otherwise, so I am wondering WHY it would only affect USB for this one peripheral and not for the keyboard and mouse? Maybe the circuitry on the keyboard/mouse is more tolerant to low voltage? Would appreciate your thoughts please.

Topic by edy   |  last reply


Low voltage to very high voltage transformer that can handle as high a current as possible?

I'm looking to convert roughly 5v ac to around 400v or 500v and be able to handle an enormous current. I know very little about transformers when it comes to their current limits. Any help would be appreciated.

Question by ChrisW7   |  last reply


12 volt stabilizer/regulator (high current)

Hi, I need something that's able to regulate the car voltage that vary from 10.2 to 14.7 (with lower voltages at startup that's not relevant)  to a stable 12v with a tolerance of 1-2% at high current (need at least 35A but I don't want to full load it too often then 40A would be better). I saw something like a lm317 with some external transistor that's able to put out something like 15A but it required a 30V input and it was a too much low current. can you link me an image of a circuit that's able to do what I want?

Topic by andry08   |  last reply


Plasma disc voltage? Answered

Hello! I've seen a few of these plasma discs and was wondering if anyone know what voltage these things generate? I know its some high-frequency ac voltage powering the disc, but does anyone have a rough estimate? Just curious. I've been meaning to take one apart, but I don't think my multimeter could withstand a  shock from it. (Rated for 600v).  Pic of a plasma disc: http://image.made-in-china.com/2f0j00HVatueUbBTGl/Plasma-Disc-J-LP200-B-.jpg Thanks!

Question by transistorguy   |  last reply


what to do with 30 high voltage camera flash circuits?

I need ideas to use 30 camera flash circuits, as i have bulk i want to use them in an array or all at once.As HiVoltage burst or light does not matterPersistance of vision?Starburst camera jammer?

Question by oliverkellow   |  last reply


High Voltage Flyback Transformer Pinout HELP!

I pulled out a flyback HV transformer from a CRT television set (I DO know of the dangers involved, and I'm VERY careful to discharge all caps and to short out the flyback).  But the problems is, I have a FB Samsung C31113D.  Very hard to find schematics or specs on.  Rather than fiddling with which pins do what (via battery and multimeter-which I guess I could do), does anyone know of a site that offers pintout schematics for different manufacturers?  I'm anxious to begin my project on building a Jacob's Ladder.  But without knowing which pins do what, I refuse to tinker.  My life is just too important. Is there anyone who may be able to help me out here?  Perhaps checking each pin with a battery is the only way to go, but I would like to avoid that if possible.  Also, what waveform does the FB  Transformer put out?  I've heard square wave, and I've heard D.C.  The only thing I have definitely heard is that sine waves tend to result in smoke from the FB. Thank you!

Topic by huck alexander   |  last reply


High Current Power Supply

For a project totally nonrelated to my tesla coil I need a way of regulating a voltage down to 36 Volts at 8 amps. My transformer (or a bunch of transformers hooked together) is suppose to have an output of about 38 volts at 8 amps, yet the voltage (with no load) is actually around 60 volts... Basically I need a way of regulating this voltage. For saftey, lets say the max input is 70 volts and it should be able to handle 10 Amps. The output voltage should be 36.

Topic by guyfrom7up   |  last reply


Why does my flyback transformer doesn't have a feedback? and why doesn't it work when I wind my own around the core?

Why does my flyback transformer doesn't have a feedback? and why doesn't it work when I wind my own around the core? there is no voltage coming out of my custom windings, but the HV coil does generate voltage.

Question by FalloutBe   |  last reply


How can I remove the diodes from a modern television flyback transformer?

I need high voltage diodes for a voltage multiplier that I am currently building, however, there is no way that my parents will let me buy any. Therefore, I think that the best place to get some would be a modern television flyback transformer. I have many of them and they are easy to find. I do not care about the rest of the transformer. The primary and secondary windings along with the plastic case will all be discarded. Unfortunately, my attempts with a dremel have all failed. What can I do?

Question by Xellers   |  last reply