Resonance Effects For Everyone To Share

[Radiant_Science]

I have a resonant effect to share

YouTube - Radiant spark6

The circuit is ONLY a 555 (in astable mode) DIRECTLY pulsing an ignition coil...the ignition coil H.V. lead has an Avremenko pump to cohere energy from a single wire.

Notice how the "ringing" is picked up by the oscilloscope lead w/o any direct connection. The setup seems to be broadcasting the resonant wave to all surrounding space. HMMM....

[brusers]

setup

Radiant_science, I have heard of the Avremenko stuff, and it's on my to-do list. I actually have a lot printed out, just have not read it yet. Nice vid by the way, thanks, there are some interesting rings going on there.

ren and luc, here is a almost professional schematic of my setup. lol



This is what I used in my last video there. I was using the battery for a little extra kick.
I have also used a 555 in place of the signal generator at one point. And although it would not reach 1.2 Mhz, it still caused some action around I think 380 Khz or something like that. Not sure what was going on there, but the purple plasma stuff was all over the place.

But yeah, the norm for experimenting is just the signal generator straight to the primary. No battery, and no transistor. Secondary coils are open on both sides.
The pic is the setup I used for the video..

Marcel

[ren]

hmm.

Marcel, it would appear that you dont have a capacitor in your unit. Is this the case or was it omitted on the drawing. As you know, the two ingredients here for resonance are capacitance and inductance. You've got the inductance, but no cap? Strange.

[Armagdn03]

Capacitance

The capacitance in such a setup is located between the windings of the solenoid, sometimes called "parasitic capacitance", Thus the coils are both an inductor and capacitor in one.

[ren]

Thanks Armagdn.

So is there an advantage to using a capacitor? Or can one simply figure out parasitic capacitance and apply it to their resonant frequency calculations and get the same result?

Something I bumped into while reading a Don Smith document.

It reminds me of the transformer specified by Tesla in his ozone patent. I found it very interesting. Any comments anyone.

(BTW Luc, you are on fire in Rosemarys thread. )

[gotoluc]

(BTW Luc, you are on fire in Rosemarys thread. )

Where there is fire there can be danger

Luc

[brusers]

no cap

The capacitance in such a setup is located between the windings of the solenoid, sometimes called "parasitic capacitance", Thus the coils are both an inductor and capacitor in one.

Thank you Armagdn03,

To ren - This is actually what I had meant by changing the coil configuration would change the resonant frequency as well. Guess I could have been a bit more specific. I think finding the parasitic capacitance would involve maybe working backwards. Probing for your frequency and working backwards with the math.
My setup operates around 1.2 Mhz.. and the inductance is really low, it's only around 10 turns of the thick speaker wire. I think to get the resonant frequency that I needed to match the secondary, I would need a cap value of around 10 pF or something ridiculously small. So you can actually wind the coil to make up for that.
Teslas patent about coil for electro magnets shows his bifillar, and talks about how the parameters change when wound accordingly. Check that out.

Marcel

[SkyWatcher]

Hi folks, speaking of ignition coils, I was able to get one to self oscillate with just a cap in parallel with the primary. Maybe this has already been observed by people already I dont know. But it draws very low power at 12V and puts out descent light in a cfl. Let me know if anyone else has seen this.
peace love light

[SkyWatcher]

Hi folks, I just realized how lacking my details were so I'll give more. I used the 555 timer w/ transistor darlington pair config. and I used a separate 12v battery to power the 555 timer and when I just touch the wire to power up the 555 timer to pulse the primary of the ignition coil it then self oscillates without the 555 timer powered up, but strangely if I remove the ground wire from the cap on the 555 timer section it still oscillates but draws a little more current. Not sure why that is, anyway there ya go.
peace love light

[gotoluc]

Hi folks, I just realized how lacking my details were so I'll give more. I used the 555 timer w/ transistor darlington pair config. and I used a separate 12v battery to power the 555 timer and when I just touch the wire to power up the 555 timer to pulse the primary of the ignition coil it then self oscillates without the 555 timer powered up, but strangely if I remove the ground wire from the cap on the 555 timer section it still oscillates but draws a little more current. Not sure why that is, anyway there ya go.
peace love light

Hi SkyWatcher,

that is interesting ... if there is no power connected to the 555 then from where is the coils primary getting the power to continue oscillating?

Luc

[gyula]

Hi Folks,

Due to the Darlington pair the current amplification is several thousand from the base to collector so the first touch starts the circuit then the stray field from the coil is able to induce a tiny current in the base to maintain operation, this is what I think.
To check this, place a few kOhm resistor across the base input of the Darlington and the negative battery line to terminate the input with a low impedance and see if the effect remains? (any resistor of 1, 2 or 3kOhm will do).

rgds, Gyula

[gotoluc]

Very good possibility that this is what is going on gyula

Thanks for posting your thoughts.

Luc

[ren]

I remember Aromaz's circuit in Imhoteps thread was able to self oscillate like that. In some cases touching the base of the 2n2222 which was Darlingtoned would cause it to start. I read that the 2n2222 is sometimes used as a touch activated switch, because the base is so sensitive especially in darlington configuration.

[SkyWatcher]

Hi folks, thanks for the replies. Sorry for confusion gotoluc, I am using 2 - 12v batteries, 1 is used to power the ignition primary and the other to power the 555 timer to give isolation. Hi gyula, I'll try that and see if it stops the oscillation. Anyway just thought it was interesting to see it occur.
peace love light

[ren]

Hi people.

Im posting this to see if anyone can help me.

The goal is to develop a PWM suitable for resonance experiments, without the need for a signal generator to drive it. I have tested out the below schematic and it works well, and I am simply trying to implement the second schematic into the first, namely the duty cycle control feature.

By combining the two on my bread board I am able to adjust duty cycle from 50% up to 100% on one of the outputs (well both Id imagine I only checked one). But I believe this wont help, what I am trying to do is adjust from 0 - 50% on time. Because the other signal is out of phase I think that anything past 50% on time will overlap the two signals?

Anyway, I picked the TL494 because I have used it before, and I found easy schematics, plus you can control dead time.

Luc, is this something Groundloop could help with? Or is there anyone else out there who has some input?

The goal is a flip flop circuit with frequency and dead time control, what it drives can come later. I am passing each output through a h11d1, to isolate the chip from the high(er) voltages that may be chosen to drive the primary. The bread board version is working well, except for duty cycle time. A different cap, or a choice of a few off pin 5 will allow frequency ranges to be changed.

Perhaps the TL494 is not the best choice, but I have used it before and it seemed to work for some of the Tesla coil builders. 300kHz is supposedly its limit, but some of them have run it at 1 mHz or so they say.

Hoping someone has some input