The Plasma Speaker

Step 3 So, how does it actually work!?!?!?

Okay, you must be very curious how the plasma speaker works...

^{Note: This information is technical, skip this step if you don't understand...}

The TL494 acts like an oscillator and a modulator, it generates a high frequency (5KHz to 45KHz) to drive the flyback transformer to make high voltage arcs. Then when you give it audio, the TL494 modulates the audio frequency into the main high frequency. Now the flyback transformer is being driven by the high frequency and the audio frequency, and when the arc is produced, the arc vibrates the air with both the audio and high frequency creating sounds.
If you tune up the 22K potentiometer, the high frequency increases, when it goes higher than 20KHz, we cannot hear it, but only the audio frequency...

I hope you can kinda understand this..

Comments

[teslacoilguitaramp,helpmeplz]

i created a profiole to ask you, or anyone, will this work with a Tesla coil, all i want to do is make a tesla coil guitar amp and this would be a major step for me getting there. and the more people help me the sooner i may be able to make a page on how to do that. so please help me!!!!!!!!!!!!!!!!!!!!

[skatattookid]

http://www.instructables.com/id/Audio-Modulated-Solid-State-Tesla-Coil/

[Betelgeus3]

A tesla coil works much differently than the device here. Not to mention running on much MUCH higher frequencies. If you could do it, it would be highly unlikely that the sound quality would be any good, and if you got anything wrong, it could short back into the guitar.

However, a higher voltage version of this device is not impossible, so you could try that (within reason. you're not going to get a considerable volume out of anything you can run off 120v wall source.).

[madshaman]

Maybe someone mentioned this elsewhere, but it's probably a good idea to optically couple your input (like with a really long fiber optic cable) if you're dealing with high frequency at even marginally high voltages. High frequency AC can see a fully conductive path even across insulators in some cases.

[firebird2000]

So from what I understand as to how this works is that the high frequency (inaudible) allowes the voltage to be driven accross the coils on the transformer at a much more efficient rate, thus allowing the lower (audible) frequencies to be transfered at the much more efficient rate, am i right? Also I have a question, is there a way to modify a normal self-powered computer speaker so that it produces these high frequencies? This is for my science fair which is on electro -magnets.

[teslacoilguitaramp,helpmeplz]

and one other thing, how much does this cost to produce, i have a tight budget, and everything needs to be bought slowly, and the more expensive it is the longer it will take.

[dumle29]

well followinging the guide grenedier made, it cost me a little under 100 bucks to make a stereo system, and thats including a 36V 10 A power supply.

(still, if you want to make a singing tesla, you need to make a sstc or a solid state tesla coil, and then modulate the power. i have no idea how to do that however.

[spark light]

Do you think this will be an adequate driver for the enables on my sstc? (no mosfet or flyback, chip out run directly to enables of ucc37322/1 thanks.

[teche]

what are some good diy component shops

[qwertyboy]

If you want to order online, Digikey is a great site.

[htc109]

i am 14 years old and i wanted to make this for our scool's science fair project.

[MatthewEnderle]

same here

[izidor7]

I made this excactly for this.... :-=)

[Gasburner]

Be careful :D

[shmolky]

Hey, is it a 47uF cap or a 47nF cap? You've got it listed as 47nF in multiple places, but you have that correction listed on the schematic. Do you need at least 250v? or can you get by with less? Also, how do you figure out the the secondary coil outputs on the flyback? Any ideas on the thickness of wire for the primary coils or does it really matter?

[htc109]

i hv adoubt about this project........can someone please urgently help me with this??? especially plasmana....i urgently need help with figuring out where to connect the two wires which will make the arc......... plz.. can someone help me with this project.......within ONE day!!!!!! plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

[spitso]

the two wires which will create the arc should not be conected to anything, they should just be close to each other say 2cm so that High Voltage will jump the air gap and create sound.

[tlowery04]

guess not...

[milo ganson]

zAP!