Right after I got done making the Plasma speaker I wanted to work on something else that had to do with a high voltage flyback transformer. I searched on the internet, looked at videos on you tube on how to make them. I am going to show you how I made a decent SSTC that makes about 4 inch arcs. This is a good way to have both a working plasma speaker and a mini tesla coil just by adding a few extra parts!

Step 1: Items you will need

Flyback driver:

TL494 chip
200uF (or 220uF) electrolytic capacitor
47nF 250v capacitor
100nF capacitor
10nF capacitor
2.2K resistor
10 ohm resistor
UF4007 diode
10K potentiometer
22K potentiometer
Large heatsink
Flyback transformer (you can get one from an old CRT.)
12v power source for TL494 oscillator
12v to 40v power source for the flyback transformer
*All the parts (Excluding the fly back, heatsink, and the power supplys, ) I got off of mouser for 12 bucks.*

Tank capacitor & Spark Gap:

8 -- 3000V .047uf CDE HV Meallized Polypropylene Film Capacitors
8 -- 10 Mohms 5% Carbon Film resistors
2 -- Screws for spark gap
*Pricy, caps was 2.22 each on mouser*

Primary Coil:

10 ft soft copper tubing � OD ( 7 bucks at lowes or you can get 12awg solid wire, it will also work!)

Secondary coil:

PVC 1.5 d x 4 w pipe (2 bucks at lowes)
27AWG enamel-covered solid-conductor copper wire ( Got from radioshack comes in a pack of 22, 27, and 30. Get three of them! Or if you can find them cheaper somewhere else get em! They are 6.59 each


1 Ft 2.5 in drain pipe (lowes 2.15 a foot)
Aluminum plated tape (7 bucks at lowes)
Wood or cardboard
Nylon bolt and nut
Just a comment on the name, all Tesla Coils are spark gap (except solid state), it suppose to be the kind of gap.
not all tesla coils are spark gap/solid state! You kids have no idea what vacuum tubes are these days, do you? :D
HA! Hey, at least they're trying, right? How many kids out there are making Tesla coils? How many kids know who Tesla even is?
<p>I know who tesla is and I am 11 and working for the army</p>
Saddeningly few.... Saddeningly few.....<br>Which is why we must spread the word!
<p>I'm 11 and I can't find a material the can magnify the plasma sparks from 0.5 inch to around 30 inch if anyone knows then tell me at <a href="mailto:cazexd600@gmail.com" rel="nofollow">cazexd600@gmail.com</a> thx</p>
If you want if to sing try replacing the spark gap with some xenon flash tubes from camera flash circuits. Hope it works
How would that work? Modulation is only possible on solid state and vacuum tube Tesla Coils.
What if you used solenoids or servo's to adjust the spark length, so different notes can be played. Maybe use an arduino plugged into a MiDi source to modulate the spark gap. It wont be easy, but a fun challenge!
You would need to have a bps of 20000 and vary the current with IGBTs. Also I have learned a lot more since I posted that comment. And some (like me) have a low budget so MOTs are the only option. MOTs can be ballasted resistively with a 150W light.
<a href="http://www.instructables.com/id/Audio-Modulated-Solid-State-Tesla-Coil/" rel="nofollow">www.instructables.com/id/Audio-Modulated-Solid-State-Tesla-Coil/</a><br />
Changing the BPS rate does change the frequency that you hear coming from the sparks, but the reason that it is not done with SGTCs is that as you increase the BPS, the energy stored in the tank capacitor in each cycle is lower and lower, and the capacitor is usually matched to the frequency of the transformer and its voltage and current, so on some cycles, the transformer will charge the capacitor and then reverse polarity, and discharge it. It might work, but at each frequency, the sparks would take a different appearance, even though the total energy in the circuit would remain the same. Also, IGBTs are not practical with a SGTC due to the VERY high voltages and currents involved. You might be able to try this with an OLTC, but I wouldn't expect good results. Also, MOTs are usually better ballasted using an inductive ballast, such as another MOT with shorted secondary windings.
Im trying to put together another circuit for this. I ordered the parts for it a couple days ago so it should be coming in soon, Im going to make a solid state and improve the spark gap, I have a couple of microwave transformers around here somewhere, Know anything that i can do with them???
Don't use microwave oven transformers, yet. You should only do this when you are very confident in your constructions skills (verify this by building a few smaller neon sign transformer or OBIT powered Tesla Coils first), when you fully understand the physics of the circuit (be comfortable with LC circuits and using calculators, understand quenching and damping effects within the circuit, and be able to understand the current flow within the circuit), and when you have a large, clean area to work in. Even a ballasted microwave oven transformer is lethal. Also, you should collect more transformers, at least 3 for a ballasted antiparallel setup that should provide 4kV. You may also consider using a voltage multiplier, to make the voltages easier to work with. A Tesla Coil built using microwave oven transformers is a big commitment, and will take a lots of time and effort. I recommend that you set those transformers aside for the time being.
well ill just work with what i got now. ill put what I got together and throw it on here and see what you all think! just gotta find the time with school and all.....
You are doing better than me. I keep meaning to make an instructable but I have not made anything cool yet. Good luck.
Before I build this and attempt to also modify it to "sing", there is one thing I am unsure of... After modifying the coil to sing, would the current be higher than in the unmodified version?
I dont know I didnt test it with a meter, I really dont think you can make it sing unless you get rid of the spark gap and make it a solid state. I tryed the spark gap and you can only hear the music inside the flyback, Im trying a new circuit and got the parts in today so im gonna try it out.
Wait, Xellers, I was not referring to making something like plasmana's plasma speaker If that's what your talking about... I meant something like this: <a rel="nofollow" href="http://www.youtube.com/watch?v=BiUlqecQKUo&amp;feature=related">http://www.youtube.com/watch?v=BiUlqecQKUo&amp;feature=related</a><br/>
You cannot achieve that sort of modulation using this sort of topology; you will need a full solid state coil as opposed to a SGTC with a solid state driver. As a sidenote, here is what I built: <a href="http://www.instructables.com/id/Audio-Modulated-Solid-State-Tesla-Coil/" rel="nofollow">www.instructables.com/id/Audio-Modulated-Solid-State-Tesla-Coil/</a>.<br />
First of all, you won't be able to modulate any sort of spark gap Tesla Coil, so don't expect to. Also, modulation does increase the current in the coil. It only varies it, to expand or contract the plasma generated by the coil to oscillate air. We perceive these oscillations as sound.
Is that a cartidge celeron heatsink
hahaha Yup!
where can you buy these items in known stores in city areas? please and thank you :)
could u use an ignition coil?
I was just wondering if metallic spray paint would be conductive enough for this purpose? A can wouldn't cost much more than a roll of aluminum tape. It would be easier to keep it smooth.
Not really for sure, I can get some and try it but I dont know how much metal is in the paint.
this is so cool i want to make one. how many volts is it and why is it so awesome? <br> <br>
Hi i've seen some pic's and vid's of tesla coils and i found out that you can make a ring of lightning instead of just sparks i thought this was achieved by putting an engine and a guiding 'lance' sort of speak (to guide your current) on top of your 'topload'. Can you please give me a little more info or even an instructable if possible.<br /> Thank you.<br /> <br /> grtz Deawon2<br />
the ring of lightning was actually just a lance-to-ground setup, and the effect was caused by a long exposure with the camera when taking the pic :D
Welp im gonna put up a SSTC on here in a couple of days, need to stop being lazy.
How can you get sparks to your hand and not get hurt?
can you use microwave caps
You know those zappers people make from disposable cameras? I'm wondering if you remove the capacitor and attached wires to the points on the circuit board that charged the capacitor if you could then use the camera as a sort of high voltage generator to power a small tesla coil. Anybody know?
no the spark gap would have to be very very small and precise for 300 volts and disposable camera circuits supply a very low amount of power :/
well i was thinking more along the lines of the rotating metallic star hitting contacts or something. Sparkgap operating at 300V isnt enough i agree... unless its a very small delicately placed gap. <br /> <br /> As for the low power, this is true. But to increase the power output you can link the 300Volt outputs in paralell. The acctual charging circuitry on the board takes up something like a 10th of the space so size is not toooo much of an issue. (look up coilguns on this site and theres an instructable on removing the small charging circuit on the flash camera circuitboard). <br /> <br /> Technically you should be able to connect X amounts of these things in paralell to get Y increase in current at 300V. I've been trying to look into the use of these power charge circuits as a power supply for a post apocalypse scenario (i liked playing fallout so i see it kinda as a hobby idea... i promise im not crazy or stockpiling things in a giant fallout shelter.) <br />
i think quite a few would be needed i doubt these things could crank 10 watts without blowing smoke, cant imagine it being practical. power supply for post apocalyptic scenario you say, an inverter? same problem again <br /> <br /> but i guess pretty large masses of em can be had fairly easily usually
Inverter? nah, i've been thinking about ways around semiconductors for highpower systems. <br /> <br /> And yes, it would probably take quite a few to get a good steady 10w/h out of it, but thats the beauty of the simple circuit... as many as you like could be added. <br /> Its the 1.5V source im worried about lol...&nbsp; a huge HUGE&nbsp;bank of baghdad batteries or maybe John Hutchinson's casimir effect battery.<br />
If you wanna make a post apocalyptic scenario maybe you could try a 'lightning machine'<br /> used for charging clouds with static energy at a certain place and then making them bump in eachother (basicly how lightning works,but I guess you already knew) and then finding an effective delivery system for global coverage<br />
First of all, be carefull. Second, using more than 1 flash charger with it's 300 volt outputs in paralell will create a generator that can supply more watts per second that just one, (scale it up to charge something that needs more amps).<br /> <br /> How to make this usefull... Charge a capacitor bank and periodically discharge it through a transformer. Dependant on how many watthours the stacked up chargers can give, you could run a tesla coil off of a huge bank of 1.5v sources (the chargers can use 2v but why push the horses to death when you can just link up more horses to take the load?)..... maybe even the Baghdad batteries could be used! Or maybe even John Hutchinson's ammoshell casimir effect batteries.<br /> <br /> suggestion for the periodically discharging switch: In the spirit of ancient technologies, i suggest a rotating spark gap where a metallic star, attached to a laquered shaft of wood, is rotated by a separate source (a dc motor or something) and thus if it is a 6 point star you would have 6 discharges per rotation as the points brush up against contact flaps or something. <br /> <br /> Completely possible to have done with just transformers and baghdad batteries to transmit radio or use for highvoltage lightning.... but thats getting off topic.<br />
Just for fun, I once used a modified camera flash supply (minus the rectifier diode) and a voltage multiplier to power a small Tesla Coil. It wasn't too impressive, but it was very fun to draw 2&quot; long sparks that were coming from a single 1.5 AA battery.<br />
wow!&nbsp; did you have to periodically charge the cap bank for a good while?<br />
Actually, it was even more impressive because the capacitors fired about twice per second! Of course, the battery didn't last very long.... ;)<br />
I'd love to try to hook up a large battery bank of potatoes or even &quot;baghdad battery&quot; bank. I've been trying to mess with circuits that pick up a static charge from the air. This is an idea dating back to Nikola Tesla's patent &quot;Utilization of Radiant Energy&quot;<br /> <br /> The idea is using a teslacoil system in reverse (the HV&nbsp;terminals pick up HV&nbsp;static in the air and periodically discharge into a resonant transformer that stores the energy in a battery or something).<br />
Ummmm.... not to upset you, but that wasn't quite what Tesla's idea was.... What I've been able to achieve is transmission of energy from one resonant oscillator to another (at the same frequency) - that isn't quite the same thing as &quot;[picking] up HV static in the air.&quot;<br />
The patent you want to look up is US# 685 957<br /> <br /> Tesla understood the research of Kristian Birkeland in his experiments with his terella laboratory. He discovered the actions behind the aurora borialis and australus. Tesla knew that charge particles were bombarding the earth every day . He realized that if the energy from the sun was only lets say positively charged particles, then the sun would charge negative and the energy would diffuse through space as 1/R^2. If the negative and positive flowed together the net charge loss would be neutral and thus the energy component would be kinetic. I dont know if he knew the magnetosphere split the charges into positive and negative but im sure he realized something like this was going on.<br /> Basically if the atmosphere consists of this charged strata, is there a way to harness it. Basically like harnessing the power of a lightning bolt, but instead of harvesting the strike, you harvest the dipole the earth naturally has before the dielectric breakdown occurs (the lightning).<br />
Thanks BeanahVulgaris, I&nbsp;was able to build a successful tesla coil! Sadly, I&nbsp;was kind of an idiot with the camera and forgot my coil was on, so after&nbsp; I&nbsp;took some pics and a video i&nbsp;put the camera on a shelf next to the coil and a spark jumped from the coil to the camera and fried the circuit... Oh well, at least I&nbsp;have a tesla coil now! Thanks again for your help. By the way, what was that you were getting into with the high voltage lightning in your initial response?<br />
Does it hurt to touch the sparks?<br />
yes. <br /> <br /> Its kinda like bodies of water. <br /> <br /> If im in a pressure chamber and the pressure of the water rises, i can take it.<br /> Thats like voltage.<br /> <br /> But voltage with a path to flow is like being in that pressure chamber and then some one busts open the side of it with axe or sledge hammer or something...... All of a sudden the water would rush through a path to the low pressure open hole. Being in this path i would get hit with a current of water and possibly shot out through the hole. weee!<br /> <br /> So when you touch one terminal its like being in that chamber. When you touch a terminal of a different pressure/voltage you create a path through yourself for the current to flow. You are in the path where high pressure meets low pressure. <br /> <br /> I forget the acctual values of current that can kill a person. But even rediculously low amperages placed across the heart (from fingertip to fingertip) can kill a person or create toxins that are very very hard on the body. Just as a small example, if we are mostly water and putting positive and negative leads into water creates hydrogen and oxygen gas, imagine what thoes chems can do to a person. <br /> <br /> Tesla's high frequency high voltage systems dont hurt as much because of 2 things. 1, the higher the frequency the less your nerves can respond to the flucutating electric fields.<br /> 2, there is such a low current that the wattage thats travelling through you is low (Watts= voltage*current)<br /> 3, there is the supposed 'skineffect' where the flowing charge for high frequency currents seems to exist mainly on the surface of a conducting body.&nbsp; True for conductors but i wonder for organisms...<br /> <br /> anyways, if i got anything wrong, other peeps pls pls correct. Thx.<br /> <br /> (sorry about the longwindedness but hopefully that answers the 1 question that was asked and maybe afew more that arose.)<br /> <br /> <br /> <br /> <br />
This is pretty good, but you might want to try to increase the power to increase the rate that the spark gap fires at. The best thing to try would be to get a bigger capacitor.

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Bio: I have 3 associates degrees in Electrical Tech/Engineering also working on my BA
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