I made a potatoe cannon with PVC tubes, and I have an electric bug zapper as the power source, but I need some sparks to fire it up.If someone has got the circuit´s plans please live a comment. THANKS!!! :D
Question by madbot1999 | last reply
Is there a simple electric component that acts like a spark gap? something that will not conduct until a voltage is reached? i would like to replace the inefficient spark gap in the Tesla coil. also, also voltage needs to be very precise, the breakdown voltage across a gap varies for a clean oscillation. then, the coil should be less noisy.
Question by -max- | last reply
From what I can tell they keep the high voltage from interfering with mains power, but that doesn't make sense to me?
Question by revelae | last reply
Hi! I was wondering what kind of ions are emitted from a spark gap when in use? I have seen alot about negative ions and positive ions, but could someone shed some light on this? Also, how harmful are these ions to the body and what exactly are they made of? THANK YOU ANY sources that help explain this will also be appreciated! Again, THANK YOU
Question by transistorguy | last reply
This is for a school project. We need to build a spark plug out of an LRC circuit and a 1.5 V D size battery. I was hoping to do it with a fluorescent light ballast as an inductor. The longer the spark in distance, the better. Thanks.
Question by paul0 | last reply
Hey guys ive made quite a few things with capacitors and modded things with transformers but im pretty new to transformers and wanted to know if anybody could either post a simple tutorial on how to us transformers or inform me on how to make a spark gap. also is it possible to up the voltage in the transformer to make the capacitor rapid charge. i have a potao canon with a crappy ignition sytem and was going to make one but i need help with the transformers
Question by mikmkt93 | last reply
I want to make a potato gun but I don't want to use a grill ignitor (unreliable) and I don't really want to buy a taser (kind of expensive) to light it. I would really like to build some simple battery powered high voltage circuit capable of making a small spark or operating a spark plug. I would like it to meet these requirements. 1. Minimal circuitry. 2. No flyback. 3. Fits in/on an altoids tin I'm still just beginning to understand circuitry so the less complex the better.
Question by Schober | last reply
I have a load of assorted ceramic capacitors. Can I create a capacitor bank to power a spark gap, and if so, how? Since it is voltage that matters for spark gaps, most of these capacitors have obscure codes on them, which I cannot find any information about on the internet, but some have voltages marked on then. I have 4 blue 2kV capacitors, 9 brown 1kV capacitors and 2 large, flat 1000V capacitors. Thanks in advance for any help!
Question by callummance | last reply
Are there any ways to protect your neon sign transformer(s) from the affects of an Asynchronous rotary spark gap?
Topic by OzoneLab
I have already looked at the lab hv-ps page and cannot find the pinout for my flyback transformer. Can anyone help me?
Question by immune2u | last reply
I had an idea for a project where I will (literally) Set Fire To The Rain. So I need a spark gap. Anyone know how to do this? I think it would be easy to charge, then discharge a flash capacitor. If that's a good plan, where can I find a schematic for a charging circuit?
Question by 4lifenerdfighter | last reply
Want to have more plasma, tu use for vapourizing water to be used as motoric force (push pistons or turbine). haven't made the coil yet, so it's a theoretical question for me
Question by skyw4lker | last reply
I have a ques if I put 400kv high voltage generator as an input in standard spark gap Tesla coil will it work https://m.banggood.com/DC-3_7V-6V-To-400KV-Boost-Step-Up-Power-Module-High-Voltage-Generator-p-915426.html
Topic by vinayakv10 | last reply
I am building a medium Tesla coil. I have checked all the parts of it and I cant find out why it isn't working. The hv transformer is a 12kv neon sign transformer. There is a gfci but it isn't tripping. For a spark gap, I'm using a single spark gap made of copper. I have tried putting them at various lengths away, but they still don't fire. The capacitors have a total capacitance of 14.1nF and are rated at 15kv. They are ceramic capacitors and current is flowing through them. The primary coil is 0.25 in copper tubing held with 0.25 inches between the windings, of which there are 7.5. I have tried using 1-7.5 turns, and that didn't make a difference. My secondary coil consists of 2032 turns of 32 awg wire around a 4 in inner diameter pvc pipe. I can verify that the 12kv is going through all of the places it is supposed to go through. I have no idea why this isn't working, could anyone help me here?
Question by MohitB34 | last reply
I have a serious issue with utilizing an H-bridge to switch polarity of high voltage electromagnets. The voltage is roughly 110 DC rectified from mains. Every mosfet I use has exploded when I tried to switch the mosfets. I tried using relays but they keep arcing and tripping my breaker. I would very much like to know if it was possible to make a spark gap that works similar to a NPN transistor.
Topic by 50ul84n3 | last reply
The power is a 12V car battery ( I think 20A) and I have a car ignition coil with an output of 45kV. I want to use a 555 for the interrupter and wondering how to size the flyback diode to protect the circuit. I have limited knowledge of circuitry and trying not to electrocute myself!thanks!
Question by dennis.ostrem.5
After trail and error i have made a joule thief with the following: 2n3409 transistor, 1k ohm resistor, led, and an air coil. what would i need in order to boost the power up to say 100v or more? the cheaper the parts the better, at least for now. I've read some what about micro controllers and using 2 555 times, but i am unable to use anything that requires a computer. everything needs to be simple enough to be used via a bread board. I am desiring high enough frequencies and voltage to jump a small spark gap. i am aware the spark is waste, but that is the point.
Question by freenergyfuture | last reply
If you could please add the schematics as well as how to wire it in that would be very helpful. I want to be able to transmit my voice and then receive it with another transmitter at a different location both transmitters will have receivers as well. When it is perfected then i will make a very in dept instrucatable on how to build it.
Question by Stefhan Albayaty | last reply
AC SG Tesla coils usually have a HV AC transformer leading to a capacitor. The capacitor is usually tuned to the transformer so the spark gap will fire twice a cycle at every polarity change due to the 50-60Hz mains frequency. Can you match up the transformer to capacitor so the spark gap will fire four times every cycle instead of two and will this still produce good results compared to the conventional method?
Question by The MadScientist
After working on a tesla coil off and on for a few years I finally finished building one, but it is running into several problems. The only problem that I can't figure out is that despite following the basic tesla coil diagram the toroid will not create a jumping spark; however the gap generator still produces a spark. The coil is running off of a 15kv nst with a gfi built in.
Question by Kaptia Teramo | last reply
I built a tesla coil, but the output is just a little spark barely visible when i approach a screwdriver to it. primary is 5 turns secondary 500t capacitor is made from 2 layden jars spark gap is about 3mm the coil is about 15cm tall the power supply is a flyback transformer driven by the zvs at 12v What do I have to do to improve it?
Question by theVader75 | last reply
Hello, I am in the final steps of perfecting a Tesla Coil that I started a few months back. I only got the spark gap to fire in one test run. Every other time, the circuit does nothing, and my new 10 kv neon sign transformer buzzes loudly and ominously. I'm really worried that I'll burn it out. Why is it malfunctioning? How can I fix the problem?Update: After a little experimenting, and checking all connections, I've found that the one time that the spark gap fired happened because of a wiring error (i connected the gap in series to the transformer instead of parallel); this resulted in a spark across the gap, but no oscillation. I'm starting to think that the capacitor's are the problem. I originally believed that the required capacitance was .003 uf, but I recalculated that and found that it was actually .0079 uf. This could explain why a spark couldn't jump. I'll order some more, and see how that goes. Thank you all.
Question by ElectricUmbrella | last reply
Hii.... a few days back i constructed a tesla coil .... the spark gap fired ... but there was no activity in the secondary ... no sparks or anything ... :( ... please advice me ... what could be the error ?? i tried tuning by changing the taping of primary ..... but no effect ...
Question by sudhanshu529 | last reply
The 2 images are the type of stun gun parts I have, I believe its a spark gap igniter one but m not 100% on that as I would rather leave it in the cardboard circular case unless I get confirmation it could be modified. What kinds of projects could this be used for, I'm pretty sure its DC powered and attempted putting the outputs to curved metal electrodes for a Jacobs ladder but arc stays in one spot after many adjustments. Ive only worked with HVAC with an unrectified flyback for plasma globes. Anyone have any suggestions on what to pump this badboy into. P.S. Using 2 metal screws from an Xbox 360 and putting them very close together makes a very nice whistle to it, :).
Topic by thebellbell
I have a bug zapping raquet and i would like to increase the voltage to create bigger spark gaps. Portability is key. Output in AC or DC doesnt matter to me, but I guess AC would get better arcs.
Question by blindpyro | last reply
Please someone help, this is my first tesla coil project, my setup: 230VAC 50Hz input ricci 9000v 50ma NST with a built in GFI (ground fault interrupter) but i bypassed the gfi succesfully .see pics safety gap 7,5 cm diameter pvc secondary 1000 turns #24 magnetwire (0,5mm) secondary 10 turns 8mm copper pipe primary (tapped at 7 turns) saltwater capacitor 16 green beer bottles in a bucket with a capacitance of 0,0122 uF or 12,2 nF (thegeekgroup bucket cap) static spark gap 28mm diameter stainless steel spheres as electrodes with oven fan (temporary, i am building a hyperbaric gap) 10cmx27,5cm aluminum toroid topload with a brass screw as breakout point RF ground aluminum rod 1,2 meter When i tested the coil for the first time the spark gap was set on 6mm and i got 20cm or 8inch streamers without breakout point but the gfi on my nst tripped after a few seconds. i didn't know there was a built in gfi on my nst so i fooled around with my spark gap and safety gap and the tapping point on the primary hoping to get better performance. after a few runs the gfi started to trip very fast and i could only run the coil with the spark gap set on max 2mm, any bigger then that would trip the gfi on the nst. so i found out that it had a gfi and i bypassed it with thick wire. Then when i ran the nst i got the exact same thing but with my circuit breaker in my home. i have made a video on youtube that shows the problem here is the link: (please help) http://www.youtube.com/watch?v=piH44ohowyE please anyone help me! Any help or suggestion is very welkom!
Question by colinbarnes | last reply
At what frequency does a basic tesla coil function at? how does the IRF9130 fit into the circuitry when it only has 2 posts? does a circuit require a spark gap to induce cold electricity and what frequency does it first take effect? I will be putting together several joule thief's and after i get them to sustain each other i intend to use the circuit with the IRF9130 to power a tesla coil. i also intend to use the JT to power an E-bike that is fast enough to travel on the highway's. any help is greatly appreciated! also, what is a Batt-cap? and where can i find them? the batt-cap in question is stated to absorb all of the batteries power and recharge it after it is fully depleted. source from:http://free-energy-info.co.uk/Chapt5.html
Question by freenergyfuture | last reply
Need new or used SCR for induction furnes! please any one who can help me! i need an SCR (Thyristor) , i dont care if its used or unused, i just cant justify the cost of a new one till i can be sure it will work; look at the picture below, iam replaceing the spark gap with an SCR. I put a drawing of a tesla coil diagram to compare with a simple spark gap induction drawing. $5 to $10 is in my price range till i know it will work. (voltage or amperage doesnt matter i would just like to see what there capable or if i can make it work for an induction furnes.)
Topic by Danielro10 | last reply
I just got a Got a 1/2 HP motor for free from my school (there were 2 old vacuum pumps that were covered in dirt and have been in a shed for like a year. One of my friend got one and is turning it into a lathe. They are really nice and quiet GE motors. Their bearing just needed some lube and then they are all fixed!). All it needs is a capacitor (can get from ebay for like 15 bucks including shipping) What should I make with it? So far I'm thinking rotary spark gap for my tesla coil (take THAT plamana!) but i'd like to utilize the power more (don't really need 1/2 HP for a spark gap!). Any other ideas? BTW I'm not making a gokart. lol. But it would be cool.... BUT NO
Topic by guyfrom7up | last reply
I asked a similar question https://www.instructables.com/answers/How-to-improve-tesla-coil-/ and I still didn't managed to get a spark. I want the simplest way to build and power this tesla coil Now I have : -5 layden jars -1 MMC -1 primary 5t -1sec 500t -1 zvs (dc out at 30kv) -1 ignition coil -5 timers -1 MOT -2 capacitors for MOT at 0.98uF -2 diodes for MOT
Question by theVader75 | last reply
Hello. I am currently trying to build a Tesla coil. However, due to a little mistake my MMC only has about 1/4th of the capacitance required to get it to resonate . Now I wonder what the best course of action would be. add a resistor to reduce the amount of amps to 1/4th of its maximum (6000 volt, 5 mA instead of 6000 volt, 20 mA), and thus the capacity required for resonance (I have a variable resistor here). Or just run it with full power, which would mean it would most likely not function as good as it could (spark gap fires 4 times where it only should fire once) I am currently not capable of adding up extra capacitors to the bank due to a lack of money, but might decide to do this in the furture Help would be appriciated.
Question by kirdaiht | last reply
I have just bought a 4 stack MOT transformer in a case and oil filled it says 8.6kv on it but no idea of amperage, I have a large variable ballast and hooked it up to my test jacobs ladder and it pulls about 10amp and really fires the ladder well. My coil has a 6inch by 29inch winding on the secondary and a Synchronous spark gap (200bps) but I cant seem to get a decent spark off it I have an MMC of 44.0nF @20kv at the moment
Question by GordieO1 | last reply
Hi, I would like to submit an instructable to the Epilog and Pocket sized electronics challenges. It is a spark/electric arc generator, which has many uses such as using it as a spark gap radio transmitter, igniting flammable gasses or liquids (camping stoves), or using the high voltage to charge capacitors. The circuit is based on that of a DIY stun gun, so the project could be used as a stun gun. In the rules it says the project can't be 'potentially dangerous'. So would this project be disqualified from the challenges for being too dangerous? I would of course warn people not to use it as a stun gun in the instructable. Thanks in advance :) Detective Inspector Me
Topic by Detective Inspector Me | last reply
So, I have noticed that music can be played with a tesla coil. I originally thought it could be done just by using a plasma speaker as the input for the primary coil, but now that I have realized this won't work because of a spark gap and capacitors I am stumped. Will using an inductor (i think that is right) which allows current to pass sixty times in one second yield a 60Hz pitch?
Question by jj.inc | last reply
I published a new instructable today (url = https://www.instructables.com/id/How-To-Build-A-Spark-Gap-Tesla-Coil-SGTC/), but it fails to appear in the list of recently published instructables and I can't find it when I search for it. How long does the publishing process usually take? If I recall correctly, my previous instructables appeared on the site immediately after I published them.
Topic by Xellers | last reply
Ive been fiddling around with high voltage for a while now and ive been working on a jacobs ladder. The unit consists on a 600v .75a digital ballast, and a flyback transformer. I got it to climb but the arc was very weak. So i did some reading and made a saltwater capacitor for it. I hooked it up for the HV + - out then to the wires. Now i have CRAZY loud arcs but it wont rise, it just sits their and is really bright. Am i just not getting the gap right or what? Any ideas would be awesome! Getting a little frustrated....
Question by sjameson1234 | last reply
Dear Sir/Madam, My question concerns the posibilty of using a Triode/Tetrode/Pentode as a spark gap in a Tesla Coil. I want to know if it is possible to configure a simple circuit that will detect the volatge in the capacitor and discharge it when it reaches full charge. I want to do this so that I can create a good impulse current in the primary and also because I want to make the tank ciruit efficient by eliminating losses through resistors and capacitors. I have a GU 81m and a 12kv Vacuum Capacitor and a MOT as the power supply. I would like to either use the spark gap style Tesla Coil circuit or create a relaxation oscillator. I know this is possible with a Thyratron but I don't have one just yet. So the ciruit should operate as a LC ciruit and discharge the capacitor once no current flow towards it. I would prefer not to use a feedback coil. Any help would be great. Cheers!
Question by speakerbox | last reply
Look at a picture of some arcs from a common spark-gap Tesla Coil, and then compare it to the arcs from a solid-state. What makes the two so different? The difference comes from the Solid-State Tesla Coil to operate in CW (constant wave) mode. This means that its power supply is uninterrupted, whereas in a spark-gap type, power is being switched on and off hundreds of times per second. If the output terminal of a CW coil doesn't have a brake out point, no corona or spark will occur. For anyone who's investigating wireless power transmission or Tesla's version of radio, this is a very helpful feature, since corona only wastes energy. And if it does have a brake out point, it can create some pretty interesting spark displays, as I mentioned above. An arc to a grounded object increases the current in the arc to such a point that it turns into a white-hot "flaming" discharge. All-in-all, a CW type coil is a pretty interesting kind to observe. But solid-states can be pretty difficult and annoying to build, and expensive as well. Since solid-state technology obviously was not available to Tesla, he found a different way to operate his coils in CW mode- a generator that was specially designed to produce radio-frequency power. He had originally created it for high-frequency arc lighting. Today, I have seen absolutely no coils run by a high frequency alternator. Of course, an alternator would be admittedly difficult to build, but since it could probably deliver more power than a solid-state coil, it would be worth it. Does anyone know if there are any companies that still make these alternators? Would anyone be interested in recreating it? Should we even bother? Thank you for listening. Peace!
Topic by ElectricUmbrella | last reply
Hello Everyone, Well, I built a half-wave rectifier using a diode and a resistor, but it doesn't seem to be working as I want. I'm thinking of adding a capacitor to help smooth out the wave, but my whole purpose was to produce a pulse of energy at 60Hz. Basically, to just chop off the lower half of the sine wave. For my diode I used a 1N5406 rated at 600V and 3 amps. The resistors are rated at 20 watts and the whole thing just plugs into the electric outlet. It seems to work ok, but when I take this rectified output and put it into a transformer to step it up to around 1000V thats when I have a problem. After its stepped up its supposed to charge a small capacitor from which the electricity (when built up) will jump across a small spark gap. The spark gap is adjusted correctly, but he capacitor doesn't seem to like to charge on this wave. Its rated 2KV so voltage isn't the problem. The problem is that it will fire once, but not repeat the cycle. (The transformer shouldn't be the problem because I'm pulsing the dc) Any Ideas? Thanks
Question by transistorguy | last reply
I've been having trouble with image comments not showing up the right size in my instructable, How to Build a Spark Gap Tesla Coil (link). In step 2, this is especially visible as some of the image comment boxes appear to be larger than the images they are posted on! The comments are supposed to be the size of the image, not smaller or larger. I've tried resizing them to the correct dimensions, but it doesn't work. Is it just my browser, or is something else going on? What can I do to fix this? Thanks! Xellers
Topic by Xellers | last reply
I am having problems deciding if I should use diluted silver nitrate on agar (Cocoa agar with sugars) or just add silver oxide and copper or copper powder to plates with Pencillum I growing on them then expose them into an aluminum sheet to fit three plates.This will determine if EMF alone (30 or 60 minutes, etc) or combined with small amounts of copper and silver (II) oxide mix or copper would prevent or kill spores? Alone EMF from high voltage may just inhibit growth but the silver copper mix may totally kill them!!It difficult since a correct dosage of this silver-copper mix must be used or copper. If it is too high it will prevent any growth before the EMF can have any effect. So maybe I need to dose it with 1g 5g and 2.5 g silver copper and see which one has modernate growth inhbition effects. Each test will be done together to save time.
Question by SHOE0007
I have just started building my first tesla coil. I am fairly experienced with electrical stuff and high voltage but I can't seem to get past building a homemade capacitor that will work. My first attempt I built eight Leyden jars in parallel that were constructed from glass canning jars and metal tape. Next I tried lining a 5-gallon bucket inside out with aluminum foil. Lastly I tried assembled a rolled capacitor with aluminum foil as the plates and wax paper as the dielectric (about 10 square feet). All of these have failed in a similar fashion; I hook them into the circuit and the spark gap wont fire. There is no arcing however the bucket and jar constructions made a faint noise similar to a capacitor charging. I have seen instructables and videos with only three or four Leyden jars in parallel and the spark gap is firing. I don't know whether the homemade ones just don’t have enough capacitance or if it is something else. If anybody has any input on the problem please help. P.S. I am using a 14kv 35ma 60hz oil burner ignition to power the coil below is a diagram of the circuit configuration
Topic by hmf444 | last reply
I recently built a tesla coil, and after some demonstrational use in school the transformer burnt out (it wouldn't do anything, and a red light appeared inside). I have already ordered a new one, but i want to prevent this from happening again. Any tips from experienced tesla coilers? thx in advance, all help is appreciated. additional details: transformer: 6500v, 21 ma. ordered here. the tesla coil has gone without sparking for a few seconds at a time, however resumed after turning it off and back on. could this be related to the spark gap length or something similar?
Question by biolethal | last reply
So here's the deal: I need to make an electrical ring prop, and while I have basic electrical knowledge, I'm a noob at High Voltage applications. What I need is to produce electrical streamers, such as what you see from a Tesla coil (at least an inch if possible) to appear to be sparking off and around a spinning wheel held in a fork (ie. the front wheel of a bike). What would be the safest and cheapest (in that order) way to accomplish this? Optional requirements: It would be perfect in all ways if it uses a DC power supply for locational freedom, and if it can be made so that a person can actually sit on the bike without you know, dying. But work-arounds for those are doable, we just need the visual effect. Edit: CG isn't in the cards for us, and we've tried the others already. LEDs and glowsticks etc. look just like what they are: cheap spinning lights, and pyrotechnic type sparks and such look more like the bike is busted and about to blow than anything else. Your first thought is "oh my god you're frying the bearings!"
Question by HalcyonDaze | last reply
I've looked all over the 'net for info on how Tesla coils work, bu all of them are too complicated. Can someone help me? Goodhart mentioned:"...This (negative ion generators), in conjunction with a larger Tesla coil can produce even nastier voltage spikes if one tweaks the 555 a bit.." How? I only want to make a (very) small one. I don't understand what the spark gaps are for, the coil parts I kinda understand, but all the rest is too confusing.
Topic by John Smith | last reply
Does anyone think I can use a florescent tube ignition/driver circuit to power a tesla coil (small). What I mean is that can I basically take out a fluorescent tube from its socket and plug in my wirings for the primary coil (capacitors and spark gap included). I don't know how high the voltage or the current is coming out of one of those things. Can anyone help? Thanks Please answer quickly, time is of the essence.
Question by transistorguy | last reply
I want to build a Spark Gap Tesla Coil but the problem is that I am unable to find a neon sign transformer locally. so i decided to a voltage multiplier. But its output is DC which means that Capacitors (most probably) not work. so please can you tell me how to convert dc to ac without changing its voltage. ALSO, I was wondering whether a capacitor will work with high frequency flyback transformers or not. ????????????????????????????????
Question by SHREYANSH_HV | last reply