Comments on: 555 Audio modulated flyback

By: Mads Barnkob

Mads Barnkob — Thu, 26 Apr 2012 16:36:52 +0000

Hey Evan

Thanks for the kind word, I will keep on it and add more content, though it will be in the high power end of the hobby

Kind regards
Mads

By: Evan

Evan — Thu, 26 Apr 2012 14:20:27 +0000

Thank you for sharing your project online like this. It was so fun to build and play around with that I actually used a very similar circuit as my senior project this year for highschool! I passed with flying colors and am still enjoying this unique device in its own neat case. I got so much help from this site. Stuff like this is what can get people interested in electronics and wondering how it can work. Thanks again!

By: Chris

Chris — Wed, 14 Mar 2012 22:20:30 +0000

Ok thank you

By: Mads Barnkob

Mads Barnkob — Wed, 14 Mar 2012 15:46:14 +0000

You example of turning it on/off 2000 times a second would give you a 2KHz sound.

You need a SSTC or DRSSTC in order to obtain the control over the switching transistors to audio modulate a Tesla coil.

By: Chris

Chris — Wed, 14 Mar 2012 07:55:46 +0000

Ok I appreciate the quick answer. So then let me run this by you. Starting with the assumption that if i turned the tesla coil on and off fast enough, would that on and off pulse of the 200 khz resonant circuit create my sound if it was in audible frequencies. In other words turn that 200 khz arc on and off say 2000 times a second so as to simulate a lower frequency arc? Cause i know musical tesla coils exist and if this is one way to do it I would like to use a sound signal driving a zener diode in reverse bias to make the wave closer to square on the gate of a mosfet that turns my whole 555 circuit on and off at the desired frequency. Do you think that is something that would work and translate all the way to the final tesla output? Essentially turning th whole coil on and off really fast? Thank you and i await your input.

By: Mads Barnkob

Mads Barnkob — Tue, 13 Mar 2012 15:02:39 +0000

Hi Christ

If you use the flyback transformer to power a small SGTC, then the audio modulation will not get through and if it does, it will only be very short burst and nowhere near audio modulation quality.

on/off or control the intensity, as the audio input is a analogue varying voltage, you can say its both, intensity can also be zero volts which would be off.

The SGTC works about the same, the coil itself have a resonant frequency and the modulation would be the spark gap that turn the coil on/off. Hence why you can not further modulate this topology by just modulating the power supply.

Kind regards
Mads

By: Chris

Chris — Tue, 13 Mar 2012 06:56:59 +0000

Thank you for this. i have been building a circuit to drive an ignition coil for a tesla coil. But I have a flyback I am going to try instead now as i ultimately want my tesla coil to play music. I hope driving the flyback this way will also translate into music on the output of my tesla coil. Do you believe it will? When you say the sound input modulates the pulse width, does it actually turn the arc on and off or just control the intensity?

By: ragatinto

ragatinto — Sat, 03 Mar 2012 02:51:04 +0000

good morning

Mads Barnkob

I’m doing thesis on the plaza speakers, is there a formula about the relationship of sound, plasma, and the force or energy.?? I am confused to find the reference ..
Please Explain ..

thanks before ..

By: Дмитрий

Дмитрий — Mon, 30 Jan 2012 14:23:48 +0000

Круто конечно но с динамиками не сравнится. По сей день круче их ничего ещё не видел и не слышал.

By: high1voltage1rules

high1voltage1rules — Sun, 22 Jan 2012 00:09:38 +0000

Awsome circuit. Thanx for sharing. Will build and enjoy!