Muller Dynamo

[energia9]

i think that the singing coil effect is the cause of the transistor being triggered to send frequency of several kilohertz to the coil, would it be that it needs a certain leght of the wire to trigger this ?  this might bring the current down from the input side. when you raise pulse frequency to an input coil, there are going to be higher voltage spikes on the output side as both the magnets add to the voltage and the sound frequency pulses , much like a flyback transformer which from several kilohertz to more than 30 khz,

[Dave45]

I wonder is the hall sensor picking up the E field of the coil, it looks to be in the right position.
Dave

[Dave45]

The position of the E field is the same as in a magnet unless altered by the core or an outside influence.
I started calling it the E field instead of the A vector because its the electric field of a magnet.
Dave

[Dave45]

http://s163.photobucket.com/albums/t283/Dave45_bucket/

[Magluvin]

Yes Mags, it does oscillate continuously. I had this tested. The rotor magnet needs to be over the coil and it keeps going.

The output is definitely higher when the coil sings. You can see that in the video, when I was trying to hook up the load the voltage went down, but that is because the hall sensor has moved a millimeter and the coild stopped singing. Then I position it back to the sweet spot and voltage goes up again (est. double).

Cap size is 47K, 40V.

This particular driver circuit is exactly what Romeros contraption was using.

Hey Chal

This is very interesting stuff.   So, when it is singing, the other coils around the rotor are receiving and putting out current?  The other coils are identical to the driver?

If so, I wonder if you removed all the magnets from the rotor except the 1 driver magnet(stationary), if the other coils would get the same output as they do when all mags are present on the rotor.  Just wondering if the rotor mags make up a link with everything.   If there is a difference with only the 1 mag vs all in place, would there be a difference if the other mags were on top of the other coils like the driver, giving the other coils similar tensions to allow them to ring also.  ;]  I believe the magnet over the coil changes the inductance, so the others will need to be matched to the driver, then all of them may sing...  :0 

I would put some fuses in line on the coils, just in case getting all of them singing may multiply what is happening.  ;]

Good stuff..   

Mags