Secondary coil, tesla coil?

Do I wind my secondary coil in the same direction as primary coil?

Question by wiccakingkamui   |  last reply


Inductor coils?

How would one go about determining the milihenries value of an inductor coil pulled from an amplifier, well different ones I have found. And living up to it's standards, google has found me no information but what an inductor coil is and it's function, but no information on how to find inductance rating.

Topic by Punkguyta   |  last reply


contact coils

Do they make a coil are something that i can use DC to a contact coil for AC?? are like using DC as a switch for a AC realy ?

Question by DAVjon123   |  last reply


Tesla coil? Answered

What gauge wire do I use for my secondary coil

Question by wiccakingkamui   |  last reply


Coil Gun

Hello! I have a question. I have been looking at making a Coil gun lately and i had an idea for a simple one. Just need to know if it would work. Basically: Battery-->Switch-->Diode-->Transformer-->Coil For my Coil I am using a coil from a Pinball Machine Flipper. Just An Idea for makers of a coil gun.

Topic by BionicB   |  last reply


Tesla Coils

Is there an easer way to make a homemade Teslacoil? Thanks

Topic by spc301   |  last reply


search coil ?

How can i make search coil for metal detector  with image if  u can please   and what the best  circuit  can i build please ? 

Question by sahel_ja   |  last reply


Coil Gun

HiI am planning to build a small (length about 15 cm) portable coil gun. There are some really good intructables out there. (I still don't have enough knowledge of how to build this thing) I found this site to be pretty interesting. http://www.jeffhove.com/robots/coilgunhowto.html How can I make a powerful coil gun like that with capacitors (not that whole blob of camera stuff)? I am hoping that it could be rechargeable, perhaps by a USB connector (5V). But that would not last long right? So I guess by adding some batteries would help. Trying to get this coil gun to the smallest size with a powerful blow. By the way, there is something called EMF that affects the system?Thanks

Topic by J50Nunlimited   |  last reply


coil help Answered

Hi Guys i hope you can help me im in the process of saucing all the part i need for my nixie clock project but the project requires a specific coil please see link: http://za.mouser.com/ProductDetail/Fastron/MESC-101M-00/?qs=%2fha2pyFadujay2cCU0hcuafg8EcJuL7YYs%2fD4YaFoKs%3d the problem is i cant find this locally is there an alternative i can use ? any help will be appreciated. thanks ps the project is the ArduiNIX : https://www.instructables.com/id/ArduiNIX-Nixie-driver-shield-assembly/

Question by Kira555   |  last reply


Use of transformers/ignition coils in a coil gun.

I've seen a couple of suggestions that an ignition coil, or a decent sizes transformer set up in a similar way, can be discharged into the coil of a coil gun, it the place of the usual capacitor bank. The main advantages seem to be a much faster recharge time, no need to create 200+V, and the availability of parts. I only have 540uF worth of capacitors at 200V, which should work for a small gun, but I have several large transformers, and a crate full of ignition coils. Does anyone know of any reasons why this would not work, or any modifications needed to make this setup work? Thanks in advance for any replies.

Topic by The Skinnerz   |  last reply


how can i hook a keyboard to a solid state tesla coil?

I want to build a solid state tesla coil and hook a keyboard up to it. how can i do this?

Question by rebel01   |  last reply


Opposing coil speakers?

Today's speakers have large heavy magnets, but what would be the result of setting up two coils which create opposing fields, one being the typical voice coil, the other being a replacement for the magnet.  Why isn't this in use today, is the power needed to create the required field just too great? This method could be used to increase volume while not overloading the voice coil right?

Question by seedorfj   |  last reply


tesla coil resonance

How do i get a tesla coil to resonate

Topic by science kid   |  last reply


Tesla Coil Grounding? Answered

Hi! I made a tesla coil like this guy! https://www.instructables.com/id/Tesla-Coils-for-Dummies/ But I didn't ground the secondary coil of the tesla coil. It seems to work ok without it, but I'd like to see it preform better. Would it help if I grounded it?  Thanks!

Question by transistorguy   |  last reply


Mini tesla coil? Answered

Is it possible to make a small tesla coil with a toilet paper roll for the secondary coil?

Question by josh1324   |  last reply


Small tesla coil? Answered

5000volt neon transformer too many capacitors? Should I just wait tell I can make bigger coil

Question by wiccakingkamui   |  last reply


building a tesla coil

Is there any way to build a tesla coil?

Topic by cris1133   |  last reply


Coil gun projectiles?

Will solid discs (think coin-sized) work as coil-gun ammunition? Or is a hole in the centre absolutely required for the eddy-currents to flow?

Question by Kiteman   |  last reply


tesla coil wire

What Gauge. Wire would you use to make a 2 foot tesla

Topic by wiccakingkamui   |  last reply


Search coil anatomy?

I am in the process of making a metal detector and have come to the point of making the search coil. My question is about the contruction pattern, wire gauge, wraps, and housing material (mostly what not to use).

Question by Dauntless   |  last reply


Tesla coil, secondary?

What kind of multimeter would measure the output in volts and the frequency of my secondary. It totalling in height is 22.7inch with a 3.5168inch diameter. Primary applied voltage 13.66kv with a distance of .5in between primary coil and secondary

Question by wiccakingkamui   |  last reply


Beginner Coil Guns

I am looking to build my first coil gun. I don't have much experience with capacitors/capacitor banks. I'm looking for a recommendation on capacitors that I could use for a coil gun that would make a proof of concept coil gun that would be safe for my first time venturing into this area. Any Ideas? I would probably order the capacitors from Digi-Key rather then harvesting them from other electronics. Thanks!

Topic by T3rr0rByte13   |  last reply


tesla coil not working :(?

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


nst for tesla coil?

How do I get an nst and for a jar capacitor do line the inside or just leave a straight diode down the middle

Question by wiccakingkamui 


tesla coil grounding?

I am building a tesla coil, the first i have ever built. I know that one side of the secondary coil is supposed to be grounded (the other side being the donut). Problem is, i am not clear where to ground it to. The ground socket on the wall outlet? a nail stuck in the ground? the negative terminal on the first transformer? I'd like to have this straightened out.

Question by cenzo188   |  last reply


Tesla coil stopped? Answered

Took apart cap all is not melted transformer brand new what do I do? Cap smells like the soap that cleaned the pieces and electricity

Question by wiccakingkamui   |  last reply


Tesla coil capacitor? Answered

Made a Lynden jar capacitor and my TC won't spark at the gap but I can hear my capacitor trying to work what do I do

Question by wiccakingkamui   |  last reply


Coil Gun Question?

So i have a coil gun with 5 capacitors at 330v and 120 uf. If i charge them with a 9 volt battery will it burn the camera circuit out?

Question by Kante Tech   |  last reply


Coil inductor make?

I have, what I believe is, a neodymium ring magnet (pictured) that measures approximately 1.6 cm across x 0.3 cm thick and it has an inner diameter of of about 1 cm. I have been debating on what to do with it (also open to suggestions) hence the title. My question is how do I attempt to predict the performance of a coil created with this? 

Question by Dauntless   |  last reply


Methods for winding coils

When I read up on the coils used in power generation, I found that the wire used is a type of magnet copper wire, and I bought 1600 feet of it on ebay. My only problem now is winding the coil. I figure I can do something like wrap it a few hundred times around a pole thats slightly larger than the rare earth disc magnets I got. Anyone have any suggestions? Btw, most of my information is adapted from normal rotating wind power generators.

Topic by fafnir665   |  last reply


Tesla coil output? Answered

Ok I'm experimenting with tops and linear transformers for therapeutic effect these seem to be the best combo so far could some aproximate what kind of signal is being out put with a step up linear transformer 4:1 and does it just feel good to me and disruptive to telecommunication it doesn't interfere with wifi

Question by wiccakingkamui   |  last reply


Mini Tesla Coil Answered

I would like to know how this http://4hv.org/e107_plugins/forum/forum_viewtopic.php?36853.post can be made? I tried to make it using the pdf that was attached but i failed. I have included pics of my failure http://4hv.org/e107_plugins/forum/forum_viewtopic.php?99090 Can somebody please help me?

Question by deathnoteviewer   |  last reply


Strong coil spring

Hi, I want to build a rotating mechanism powered by a spring. Once released,I need the piece to make 2 rotations in a fraction of a second. I also need it to be quite powerful since it will have to push another piece. For this application, I believe that a coil spring (such as those we can find in clocks) is the best suited, but will it be powerful enough ? An if I use a torsion bar spring, the problem is that I probably won't find one that can make 2 turns.... they are usually designed to be used on small angles only. I would be glad to have your advices ! :)

Topic by 1tibo2.   |  last reply


First Tesla Coil Answered

I purchased a small tesla coil kit online.  The kit is working but I need help improving it. Instead of having the typical primary and secondary windings with a toroid on top it has the driver circuit pulse a 50k transformer producing a 1 inch spark.  I'm wondering can the output of the transformer be connect to a typical primary windings and secondary windings with a toroid on top? I have a link below to the schematic. Also if this works would you recommend 1000 or 2000 turns on the secondary and how many on the primary?  30 or 36 gauge for the secondary? Link to schematic http://i92.photobucket.com/albums/l23/tucsoninsurance/Public%20Album/20130925_203001_zpse3c1927d.jpg Here is a link to the tesla coil  picture.  http://i92.photobucket.com/albums/l23/tucsoninsurance/Public%20Album/20130925_203600_zpsc84f3177.jpg Thanks for your help.

Question by mpatti75   |  last reply


Tesla Coil Safety?

My high school recently had an engineering fair, and my friend had built a tesla coil. Its has multiple spark gaps, an RF filter (I think thats what its called), a 120 to 20000v transformer, and toroid top-load, if any of that matters. We/I would entertain ourselves by standing away from the coil and holding a fluorescent tube (by the glass with bare hands, not by the contacts) near the top-load and watching it light up. Even though I was well away from the coil, my forearm muscles would twitch, especially it the coil spark hit the contact on the other side of the tube. Then if anybody touched me, both of us would feel a shock and the same slight twitching (the same kind of twitching you feel from those electric muscle stimulators with the pads you put on sore muscles). We even set up a chain of about 5 people holding hands, and all of us would feel a shock, even though only the first person in the line (aka me)  was holding the fluorescent tube near the coil, with my hand on glass, no where within range of the streamers coming from the top-load. Now for my question: is this dangerous? (I know its non-lethal, im talking about my nerves) And what exactly was happening? because it was not an incredibly large coil, and i know that the field of a coil is much larger than the actual streamers. I also read somewhere that insulators dont work the same at incredibly high voltages. I think what I was feeling was the skin effect, and the charge came from the excited electrons in the tube. If my ideas are correct, then wouldn't me holding the tube be just the same as if i had just put my hand near the top-load and let the streamers hit me?

Question by masterbuilder   |  last reply


Tesla Coil with MOT's

Hello everyone, I am looking to get some advise. I am building a Tesla coil and cant really get any transformers other than MOT. I have four MOT with all their other components (Capacitors). What I am asking is can I use these MOT wired up in a certain way and I also read somewhere that I would need to add a component to prevent the MOT's from sucking in too much power. If anyone out there can give me some detailed advise it will be great. I just started the build so pictures are coming soon. Thanks in advance to you all

Topic by arenavles   |  last reply


Magnetic accelerator coil Answered

Im going to try to keep this short. So a friend and I are both sophomores at our highschool and we are both in chemistry (which is a higher level science) and i built a coilgun for last years project and attempted to build a PWM driven one this year. My friend and I want to build a rather large coilgun using either 10 microwave oven caps or close to 40 or 50 caps from computer power supplies. What i need help on is whether we should use the microwave caps which are high voltage but low capacitance or the power supply caps which are 200 volts and around 500 micro farads. I also need help on what wire to use for my coil and how many turns for the coil. i would like help with a coil for each cap size. We are planning on using either a 3millimeter by 5 centimeter long steel rod or a quarter inch bolt. our goal is to at least shoot it through the wall of the physics classroom and maybe through the door of a car. anything helps. Thank you

Question by budhaztm   |  last reply


Tesla Coil MMC

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


Coil Gun Project

Hey guys, I am currently building my first coilgun, first of all, the components: Charging:     Disposable camera circuit x 2     2 x D cell batteries Capacitors:     2 x 1200uF 200V     2 x 680uF 200v     2 x 300uF 200V     1 x unknown (attached to camera circuit with no info) Switch:    250V @ 15A - 6 pole toggle (I will upgrade to some for of solid state when I have the money) Now, because I have two of each capacitor I have put one of each into a parallel bank, giving me 2 cap banks with one of each cap, I then connected the two banks in series, I have not done a lot of maths yet which I think I should but I was hoping that would give me 400v which seems to be average. The problem is, it is only charging to 340v tops, I think that may be due to the camera circuits being wired incorrectly. I have the two batteries in series, both charging both of the circuits, then the circuits both charge the caps, the + and - outputs meeting on the caps, am I doing that wrong? Also, does having 300uF caps in series with 1200uF caps hinder the bigger ones? Would I be better of with just the 1200uF and 680uF, or maybe even just the 2 1200uF in series? should I also leave the small cap on the circuit or take that off? Thanks in advance guys, any help would be greatly appreciated. I am having a lot of fun with this project and while I wouldnt like to be on the other end, it is still not as powerful as I would like, even for it's small size.

Topic by TristanD27 


Can someone please make 3 bifilar coils?

Hello everyone I'm in the need for some BIFILAR COILS, and just to be detailed I don't mean the PANCAKE type. I will pay through PayPal or credit please comment to answer question no private messages why am I asking instead of making my own? I'm living in a tiny room do to my spinal cord injury. So it's a bit difficult at this time alsl lastly if anyone happens to have some they're not using or are done with a donation would be nice, I'd cover shipping and handling of course. Lastly if anyone knows where they're sold online please do say so, I've had no luck finding premades online. THANK YOU TO ALL AN ANY WHO HELP

Question by bettersweeps 


best schematic for a solid state tesla coil? Answered

Can anybody please help me with a sstc schematic? I'm thinking of building a sstc for an exhibition in my school and so i might need to run it for quiet a long time(like for a day with 5min intervals), and so it shouldn't overheat and die. Though I've found some designs especially the steve ward's sstc schematic, the problem is I couldn't get the ucc37322 & ucc37321 gate driver ICs, a suitable and more available substitute would be fine(I live in India). And which mosfet should i use for this purpose, i would be running it at 220v straight from the mains(in a H-bridge confg). And is the following audio modulator going to work with this?

Question by jasshopper   |  last reply


Can I use an ignition coil to run the primary coil of my tesla coil? Answered

Alright, I ask that everyone please read everything in this question before answering :).  I hopefully going to be very thorough.  I am building a tesla coil and am just about to give up and buy a NST.  I have many high voltage sources laying around, but, so far I haven't had much luck.  The first plan was to use a large ballast (florescent light) to drive a flyback, but it was to powerful, so I got a CFL driver, and it didn't work (not the driver so much as the whole project)  so now I am left with an ignition coil.  I know that I can use a light dimmer switch to power it, but it will still be 60hz I think and I here that is not safe for a tesla coil.  Although, I don't think anyone is going to let high frequency and voltage arc across their skin anyway.  So will something at this low of a frequency still work to power a tesla coil.  If not do you have any ideas I can use.  I have a flyback transformer and an ignition coil so any ideas that come to mind please share.

Question by jj.inc   |  last reply


coilgun

post in the comments your coilgun, capacitor bank, and how your coilgun works. I want to know everything about it. EX: how long your coil is, how many layers your coil is, how you built it, etc. The more you put the better. I also would like some advice on my new coilgun I'm building. I want to use flash-capacitors and 26-gauge wire. I don't want to use a lethal amount of electricity if at all possible. Thanks!

Topic by Pyrofan   |  last reply


Electromagnetic and Magnetic Levitation

Hi! I am setting up a levitation system and need to estimate the amount of voltage and current that is needed for a 2" dia. coil to produce 4800 Gauss. I don't have any restrictions/requirements on the core, number of turns, etc as long as it would produce 4800 Gauss with a 2" diameter. How can this be calculated? (I have spent a lot of time googling for such information, but I am pretty confused and didn't find how to calculate this) Thanks!

Topic by J50Nunlimited   |  last reply


DC motor core insulation from windings? Answered

I have recently attempted to rewind an old 240V AC drill motor to a low voltage DC one. After winding the 12 coils I found that all of the windings were shorted to each other, I'm assuming this is due to the thin enamel coat on my wire breaking against the edges of the steel core. As a result I need to rewind it, but I am unsure what kind of insulation to use, tape, some kind of glue or sealant, varnish, I was thinking a hardware store type product nothing online or that costs a lot. 

Question by The MadScientist   |  last reply


How can I improve my coil gun's coil? Answered

My coil is made of 22 gauge wire and the inside diameter is about 1/8 in. It's 1 3/4 in long with about 7 layers. The ammunition is a little over an inch and fits snugly inside the coil. How many more layers should I make it, and what else can I do to improve it?

Question by cardboarddude   |  last reply


What is the current of an ignition coil?

I need to know the amount of milliamp s of a basic ignition coil ?   (not an oil burner ignition coil)

Question by The MadScientist   |  last reply


Conical coil inductance calculation? Answered

Does anyone know a reliable calculation or online calculator for conical coil inductance? I am calculating this for a Tesla coil primary if anyone knows is a conical coil primary suitable for a 2000W system?

Question by The MadScientist   |  last reply


Would this Tesla Coil work? Answered

I am wondering if this DC powered Tesla Coil will work.

Question by josh1324   |  last reply


how to power a starship coil?

I want to power a starship coil that i built

Question by nerd7473   |  last reply