Dr Ronald Stiffler SEC technology

[NickZ]

      Hi again: No luck uploading the image from my phone.
   Had to use my PC to post this pic below, so here it is.
   The bulb just touching the plastic insulator, on the aluminum heat sink that's behind it.   I don't need to hold the bulb, or connect a ground clip to anywhere on that bulb, and it's quite bright. 
   Once I add the two diodes, I'll do another video.
         
                                                                                      NickZ
.

[Slider2732]

Neat bulb...is it perhaps the way the outer case surrounds the LED's that causes such good running ?
Oh, I did something related to your memory of the 100 LED's Nick, that was the Pigeon Loft series. It used a switched off wall adapter and several coils etc a little like Dr. Stiffler's PSEC. It also used an Earth Ground via a wire running outside through a room window to a stake. There were 18 LED's on that, not quite as good as whomever did the other, but was a fun set of experiments and may be worth a revisit.

Have just uploaded a vid of the Colpitts now soldered.....it still works with the missing cap. Did have to add a couple of turns though to the L1 to get it down from 20Mhz to 13.6Mhz.
The vid also shows my build of Lidmotor's crystal oscillator circuit. Only had a 27MHz and a 33MHz. The vid shows the 27MHz.
https://www.youtube.com/watch?v=Me4b5XJfKrQ
(2min 36sec)

Here's a pic of the Pigeon Loft
And the vid from 2011: https://www.youtube.com/watch?v=n_0EufPJwJ0

[NickZ]

   Well, Slider,
   Concerning the Pigeon Loft,  it was getting through there "somehow".  Now you know that it can be called stray capacitive AC. 
Turn off the breakers... watch what happens. That's why I showed it lighting those three leds, on my video, with no input. But, there is an input, isn't there?    So, guys don't get fooled, who know how many leds will light on stray AC. 

[gyulasun]

Hi Nick,

It is good you found that LED lamps with reflective surface are also able to give light by capacitive coupling too, this shows that surface mount LEDs with metal (Alu or copper) back plate may not be neccessarily needed.
This is certainly a step forward and it remains to be tested which of the two types: the SMD LEDs with Alu plate only 0.3 - 0.5 mm behind the LEDs or the reflective surface around the LEDs needs higher RF energy or they can perform more or less equally well with RF excitation.
I found 12 V DC spotlight LEDs with very similarly looking reflective surface like your lamp has, see this:
https://www.ebay.com/itm/362128562522    and such spot lights exists with SMD type LEDs too:
https://www.ebay.com/itm/282232157780    and also for AC 110 V of course: https://www.ebay.com/itm/201750169799   

Normally, such spot lamps you show with those LED types are probably rated for 2-3 W power consumption. Assigning 25 mA for a LED out of any of the 24, with 3.3 V forward voltage the power involved calculates to around 2 W. Obviously there are higher power spot lamps, mainly with SMD LED types though. You can check AC current for your lamp if you wish.

Thanks,
Gyula

[gyulasun]

Hi Slider,

Thanks for the video on the oscillators.  Would like to notice these:
--The ferrite cored oscillator coil is surely mutually coupled to the big air core coil  I think, a higher distance should be insured so that no any coupling could happen between them, except for the single wire connection.

--The air core coil should have a self resonant frequency the oscillator has: i.e. you need to sweep the oscillator frequency to find it and this should happen at around the 13.5 MHz or thereabouts. (if the Doc's test is to be explored, that is.)  I do not know whether you tuned the oscillator frequency to the self resonance frequency of the air core coil. 
I know you are aware of this but the close placement of the two coils may mutually influence each other and eventually the air core coil should not receive energy by mutual coupling to the oscillator coil.

--Regarding the crystal oscillator, the 27 MHz frequency is not recommended by the Doc, I think he mentioned this in one of his videos.

But this oscillator is a good learning tool, here is why. Such crystal oscillators give out square waves or distorted sine waves, (you may have checked directly the output waveform)  and I think this explains why the probe LED (AV plug) attached to the pick-up coil next to the big air coil (which partially has the ferrite rod) remains lit when you move out the ferrite from the coil.
It remains lit because the crystal oscillator provides a signal surely rich in harmonics and some of such harmonically related components are able to light dimly the LED.
It is also possible that the pick-up coil itself also resonates from a component and feeds the single LED AV plug.

In an extreme case, even the other pick-up coil you call as the sniffer coil and use for the scope may be in resonance somewhere, tuned by the 15 pF input capacitance of the probe.

One more thing: you find a 9 MHz resonance somehow (with one position of the ferrite rod) while the coils are driven by 27 Mhz and the harmonics. One thing is sure: out of the 3 coils (the sniffer, or the ferrite rod tuned or the pick-up coil driving the AV plug) has a resonance at 9 MHz: thus a subharmonic (one third of 27 MHz) is amplified by resonance. And due to the mutually close positions of the 3 coils, when you move the ferrite rod, you willy-nilly tune all the 3 coils I think due to the EM coupling between them (all the 3 coils are placed parallel wrt each other lengthwise).

Hope this helps. 
Gyula