A validation of the UP-SIDE-DOWN phenomena

[giantkiller]

Well, well, well...

http://www.youtube.com/watch?v=4xF1Fq2wB1I&feature=channel

--gk.

[tsl]

i have to read a bunch of new pots but anyway nice work EM.

[Nikola Tesla]

Hi EmDevices

Did you Measure the actual frequency of the LED?

What happens when you place a piece of metal above or below??
Dont you think the second coil just alters the inductance from the first, thus changing the resonant frequency, detuning the entire setup?

Also is there any hi current devices on you home lines when this happens?? (washing machine, electric stove etc. that makes the wires in the wall carry current).

Or is it just happening without current in the wires at all?

These are good things to eaxamine!!
Kepp it up man.

NT.

Ps:
Make sure this won't be the next Magniworks rip off, place your tag on the video's as we all should to prevent these problems...

[hartiberlin]

Hi EM,
nice effects.

Did you try it already outside outdoors ?

Doesit really depend on your room electrical wiring ?

Does it come from your ceiling this magnetic field ?

Why does the big coil need to be placed above the small output coil ?

Is that really some kind of lens effect or could it be interpreted also
differently ?
Maybe you tune both coils via the distance somehow
like a losely coupled transformer and thus increase or decrease
the resonance frequency of the output LED coil ?

But why doesn´t it work when the big coil is under the output coil
at the same distance then ?

Hmm..strange..

By the way, how did you design the coils ?

Did you calculate the resonance frequency  of the LC tank
with the fixed cap you have and then winded so many turns
to get it to 25 Khz resonance ?
So how did you know, how many windings of your coils you
had to wind to fit to your 25 Khz resonance ?

Many thanks.

Regards, Stefan.

[EMdevices]

@Stefan,
outside , far from wiring it does not work ! Yes it depends on wiring, I explained that in my previous videos.
Big coil on top is perhaps a lensing effect, yes you're right.
I'm beginning to think the coil proximity is a combination of tuning and lensing.

Design Steps:
1) find a magnetic frequency.
2) find some low ESR capacitors in the tool box and shoot for a ratio of 4 to 1, inductance to capacitance, or bigger, perhaps. (some people suggest inductance =6 * capacitance)
3) once I know the capacitance, it's time to design the coil for a particular inductance.  I use equations to get approximations. 

For example, a circular loop has the following inductance:

L = N^2 * R * y *[ln(8 R/a) - 2],
where,
  N = turns,
  R = radius (m)
  a = wire diameter (m)
  y = permeability
So I plug in the inductance I need to get the frequency I want, f = 1/(2pi sqrt(LC) ),  then I solve for N, knowing the Radius and wire diameter I plan on using, and of course, the permeability of free space, if that is the case.   

4) then I try and fine tune by reducing the wire (so it's good to try and overshoot a bit on the inductance and then scale back by trimming the wire.


Hope that answers your questions,

EM