Dr Ronald Stiffler SEC technology

[gyulasun]

I tried an old Dr. Stiffler 'one wire energy transmission' experiment today using my 13.56MHz Crystal Oscillator.  It worked.

https://www.youtube.com/watch?v=3KzctX1oxzE

--Lidmotor

Hi Lidmotor,

Your air core coil (let's label it as La) identical to the Doc's L3 type and mounted on that prototype board just absorbs resonant energy from the other L3 air core coil (let's label it Lb) that is driven by the crystal oscillator.  Because both La and Lb coils have the same resonance frequency, part of the resonant energy from Lb is transferred to La by so called mutual induction,  this is why the LEDs can light up on the proto board when a high enough induced voltage can defeat their threshold voltage level via the AV plug diodes.

The word "mutual" has importance: it indicates that both La and Lb have become part of a common resonant system and do influence each other: whenever you tune Lb coil to the xtal frequency while the La coil is not nearby, then you need to retune it again when your La coil is placed close to it. AND this explains why the LEDs at the other end of the long single wire is distinguished the moment La is coupled to Lb: an Lb coil detuned from the crystal frequency cannot provide enough energy to light that remote LEDs. This is the 'sort of dynamics' (as you put it) going on when you move back and forth the La coil placed on the proto board (video time 2:40).   You can look up the term 'mutual inductance' by goodle if needed.

A notice: I think the output voltage of your boost converter is influenced by the near field of the long single wire and probably also by the EM field of  coils La and Lb.  Have you noticed the output DC voltage was 13.4V at the start of the video and it climbed up to 18.2V by video time 1:39?  And when you move back and forth the proto board with the La coil on it, the DC output goes down to 13.2V and then up to 14-15V (around video time 2:40).
And when you put down the board the voltage settles at 13.2V again (2:48) and as you moved your hand nearby the converter and the coils the DC output was fluctuating and went up 14.1 V or so at the end of the video. 
Probably the EM field creeps into the control circuit of the boost converter IC and fools it at times.  By studying the IC pins (if the chip is idenfyable) where control may have input, some 10 to 22nF ceramic capacitors may help filter the RF influence.
Thanks for making and showing this setup.
Gyula

[gyulasun]

Hi gyula. the battery is 3.7 volt and the boost coverter output is 24 volt. today I testing the brightness output with my own LUX meter BH1750 sensor and Blynk app. here the result
also with three crystal LUX is stable ( screenshot test with three crystal )

Hi Erfandl,
Thanks for the Lux meter screenshots, they nicely show the higher light outputs as you placed 2 and 3 crystals in parallel.

Okay on your boost converter has 24 V DC output, and its input receives the 3.7 V battery.
Now please explain where is the 3.4 mA current measured you mentioned in your earlier post above? Or was it 34 mA?

I understand that the current input to the oscillator reduces when you use 3 crystals (from 28.4 mA to 23.1 mA):  did you use the 24 V DC from the boost converter back then?

Thanks,
Gyula

[gyulasun]

Gyula,
sorry, yes i did take a look to some harmonics (5th, 7th) the same way as the base peak, and also did not notice any difference.
The above screenshot where taken with a frequency span of 306kHz, so at the 7th harmonics i should have seen something i guess.
Below the 2 screenshots from the spectrum overview showing the harmonics with both 1 crystal in and then 5.
Peak 8 is again a strong local  Fm station leaking through.
Itsu

Hi Itsu,
Many thanks for all these measurements.  I will think on this multi crystal oscillator operation further on and return to it when a useful explanation can be found.

I would make a single notice to the spectrum analyser screen shots you kindly included.  If I compare the harmonic frequency values reported under the swept screens I find they are fully identical, both for the single xtal case and the 5 xtal case. 

For instance say the 7th harmonic is at 94.778611 MHz with the single xtal and the same with the 5 xtals, only the amplitudes differ which is okay of course.  I mean you earlier measured about 5 kHz difference between the 1 and the 5 xtals at the base frequency:  13.559 MHz for the single xtal and 13.564 MHz for the 5 xtals  (from your Reply #615) and this 5 kHz shift is ok for the 5 xtal case due to the higher self capacitance in parallel.

I would think that all the harmonic frequencies for the 5 xtal case would shift also higher by several kHz, compared the same to the single xtal harmonics.   Understand?

Gyula

[itsu]

Gyula,

yes i did notice that too, but i think its due to the nature of this SA, its not a professional one,
its probably one of the cheapest you can buy and lacks some accuracy on this 124Mhz range.

Zooming in onto a specific peak will show the accurate frequency (like 13.559Mhz for a 13.56Mhz crystal).


Itsu

[gyulasun]

Okay Itsu, thanks and I also suspected the SA may cause that. 

Gyula