My crazy project

[TinselKoala]

Yep, I suspect capacitive coupling. You could try this experiment: instead of connecting to the core, use a very small capacitor, a few tens or hundreds of pF, connected to the coil itself, and then connect the LED/Coil combo to this capacitor instead of to the core. Sweep frequency. Are you able to light the LED this way?

The LED/Inductor combo reminds me of some effects I demonstrated during the Little Miss Mosfet era. I have so many videos of those things that it might take me a while to find it, though.

[tinman]

Yep, I suspect capacitive coupling. You could try this experiment: instead of connecting to the core, use a very small capacitor, a few tens or hundreds of pF, connected to the coil itself, and then connect the LED/Coil combo to this capacitor instead of to the core. Sweep frequency. Are you able to light the LED this way?

No,that dosnt work,as the coil/LED combo is way to far away from the stator-about a foot.

https://www.youtube.com/watch?v=cJB_cnx9Rx8

[gotoluc]

Hi Brad,

interesting stuff as always!

If you disconnect the scope probe on the pickup coil and led, does the led light stay just as bright?
Keep in mind your scope probe most lightly have a common ground and that could complete circuits.
EDIT
no need to reply to my post. I just looked at your video again and it looks like you are using the scope ground to carry ground to your pickup coil and led and you are quite aware of the coupling.

Maybe put a shunt resistor on your signal generator input and hook up your scope to it to see if the current changes when you connect the led?   obviously you would connect a separate wire going to your coil and led and not use the scope ground.

[TinselKoala]

No,that dosnt work,as the coil/LED combo is way to far away from the stator-about a foot.

https://www.youtube.com/watch?v=cJB_cnx9Rx8

No, I think you are misunderstanding me. I mean capacitive coupling between the stator windings and the laminated core. It doesn't matter how far your LED/Inductor are from the rest of the system. I suggested that you connect the wire that you touch to the laminations, to a small capacitor instead. 50 pF-200 pF or so. Then connect the other side of this small capacitor to the coil winding that is around the laminated core. This would simulate the capacitive coupling between the laminated core and the coil which is wound around it.
Nice scope. I can't watch the video at the moment, so I apologize if you actually did the experiment I suggested. Distance of the LED/Inductor combo doesn't matter to the experiment I mean; the capacitive coupling takes place right inside the stator coil with its core.

[TinselKoala]

No,i dont think that is the same. Looks to me like a single turn coil/light bulb combo,being powered by magnetic induction-wireless transmition. When TK gets the supernova thing happening,i believe that is just the transmiting and recieving coils coming into resonance.

That's right. When the Rx and Tx loops are close in my system, the resonant frequency of both parts shifts slightly to come closer into precise tuning. I don't think your system is doing this.