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
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
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
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
I am trying to build a high voltage amplifier that will amplify an AC signal of approx. +-5V to a signal of approx +-100V. I was looking into building a common-source amp using JFETs or a common-emitter amp using BJTs, but both seem to have an output waveform of 0V to +100V. Is there a way to modify these amps to have an output waveform of -100V to +100V? Also, if anyone has any better Ideas, please let me know. Mark
Topic by questionmark05
I found a flybacktransformer and I would like to sale it. its is nice and heavy built and would have a better duty cycle than one of the newer ones. I would like to get $12 for it. finding a flyback like this one is not always too easy. I added a mug to show the size of it.
Topic by inductionheat! | last reply
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
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
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
I am in need of a power supply that can give out about 500V @ 13A. I know it's high, but I want it to charge a capacitor(400V, 1000μF, 13A) for my coilgun. I've already tried a flyback charger, but the result was to blow the capacitor up(I think that it couldn't withstand so much voltage, despite the amperege was lower that its threshold). I don't want that to happen again and I want a relatively fast way to charge the capacitor. Also, the power supply needs to be portable. Another thing: the voltage is not mandatory to be THAT high; the amperage also(let's say...1 or 2 amps...)... However I need DC pulsating current, at 20 kHz NOTE: I really hope that I'm not asking too much.......
Question by N3v3rm0r3 | last reply
I need to know because I may be using one as my power source for my Tesla-coil.
Question by nerd7473 | last reply
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
Question by ruimoniz | last reply
I found an old monitor which i am pretty sure that it is not broken and it works now i wana use the high voltage output using the monitor driver but i dont know form which part should i get the high voltage please help me i need this immiedtly thanks
Question by maaktabkh | last reply
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
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 portable and efficient way to convert battery power (3 volts) to around 400 volts. I will be using alkaline batteries... This will be used to charge a high voltage capacitor bank.
Question by brooklynlord | last reply
I heard disposable cameras use high voltage for the flash. so if you were to take out the capacitor from 2 and plug the lead to the flash from 1 camera into the battery holder for another you could keep putting them together to get higher and higher voltages right?
Topic by NetReaper | last reply
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
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
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
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
So I have been doing a lot of math for a rail gun, and I finally found out what statistics I need for the capacitor to get the energy needed. But I may have ran into a problem. The voltage for the system is rather low, but the current is high, so I need a capacitor with something like 60-ish Farads, and 20 V, and of course the ones I find are outrageously expensive. ($2,400!!!) But I was able to find ones with 70 F but only 2.1 V, but since I need 20 volts I was thinking that I could use a voltage booster, but I am not sure if that would work, or if I can find/make a Voltage booster that can withstand that kind of current (would be something like 67.5 KA) the other option is find ones with higher Capacitance, which I did, but they are still a bit on the expensive side ($70, and since i need to it comes up to be $140 or so (not as much but still)) So what I wanted to know is whether it would be less expensive to try to find/make a voltage booster, or just buy the $70 capacitors? I suppose I should also be asking is it even possible to get a voltage booster that can that that many amps, and how easy would it be to make? Oh almost forgot, another question (which would skip having to solve the others) is: Is there a way I can increase the voltage that a capacitor can take, or increase the voltage in a capacitor bank, or some variation of those? Because if there is, that makes everything easier, but I couldn't find anything on doing that so yeah...
Question by Mecknavorz | last reply
Every so often, I see "violet ray" electrotherapy devices come up on ebay. They often sell for silly money, but occasionally one will sell for only a few pounds.Originally quack medical devices, they seem to operate in a similar manner to a plasma globe (gas discharges, high voltages). Does anybody know how they work? Is it worth getting hold of one to rip the innards out to get at the high-voltage supply?(Yes, I know they have "adult uses", but, really, it is the innards I'm talking about)
Topic by Kiteman | last reply
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
Question by nerd7473 | last reply
Hello, I am in need of a little help. I recently purchased a small Holmes fan with filter as I had a coupon, it was normally 15 dollars, but the coupon was $10 off. When I first bought it I intended to convert it into a electrostatic precipitator, then when I got it home I realized it already had a built in ionizer, which simplified my idea as I can use that as the hv power supply. I am going to use alternating high and grounded metal plates in place of the filter. I was wondering what is the best way to ground the plates? The fan doesn't have a grounding wire.
Topic by rbneville | last reply
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
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
Have you? does it damage it for instance? or is it perfect because hi voltage likes to "crawl" over things
Question by oliverkellow | last reply
Question by ravebot | last reply
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
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
Hello! So I found this transformer the other day, it's a 240v to 75kv here where it's gets interesting, it's a shell type, with two separate transformers I'm guessing. It has a input for 240v on each end, it has 1-5 taps but 1 is not used 2 is phase 3 is neutral 4 is earth and 5 is not used. It only has condanuity between 2 and 3 on 240v side. On the high voltage side it has only one output and no condanuity to the core or anywhere, So I'm confused. I'm wanting to make it in to a high voltage Jacobs ladder setup. I have a varic that is 240v and goes from 1v up to 280v on the wiper side it is motor driven. Can I arc between the two hv posts? Also both transformers are have the same phase in parallel. Please help me!!!!! Thanks!
Topic by nz dude | last reply
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
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
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