Self running coil?

[LightRider]

Hi LightRider,

thanks for doing the tests and posting your result.

Do you have a scope?... if so, can you take a picture or post a scope shot of the gate pulse (without OPTO) that gave you the positive result and the pulse of the OPTO'ed one.

I would like to see what each form looks like.

Thanks for sharing

Luc

Here is a short video that appears to demonstrate what gotoluc himself experienced.
For this video the 4N35 OPTO was disconnected and
the signal generator was directly feeding the gate (square wave)
the oscilloscope shows the gate pulse (square wave - 5v p tp p)
and the measurement of the IRF640 drain (this helps for the optimum adjustment)

note that my knowledge and experience in the field of electronics is limited,
these experiments are done for fun only.
If you find errors, which is likely, please let me know.

Thanks,
LightRider

Video at:
http://www.youtube.com/user/LRCan1?feature=mhw4

sorry for quality ... and no sound ...!   

[gotoluc]

Thanks LightRider for taking the time to make a video demo of your setup.

Do you have a conclusion as to what is going on in your experiment?

Thanks for sharing

Luc

[gotoluc]

@all

I can explain any of those scope shots in Coil test #11, #12
video except the weird waveform in scope shot #1.
just ask if interested.

Yes Mark please don't hold back.

@gotoluc

An interesting experiment would be to get some of Bedini's R60
welding rods to make a square metal core for pickup coil. Set one
end of the core parallel to the base of the plastic spool. Then stick
the magnet stack to that base and place the other end of the core
to near the toroid. The core mag circuit will conduct the magnetic
field up to the toroid. Nothing should happen because of the
strength of the magnets, but it still might.?.That is - no cutting
of lines or reduction of field strength = no signal from the pickup
coil.

:S:MarkSCoffman

I'm not sure I follow or understand this Mark. However before making changes or adding, I would like to confirm if the energy is coming form the Generator.

Would you agree with NextGen67 that if I use a mosfet with lower input capacitance and it still performs like the IRF640 that this would be an indication that the extra energy was not coming from the Generator?

Thanks for sharing

Luc

[LightRider]

Thanks LightRider for taking the time to make a video demo of your setup.

Do you have a conclusion as to what is going on in your experiment?

Thanks for sharing

Luc

A conclusion... not at this point.
Experience seems to show that with the 4N35 no effects outside the ordinary is seen.
Assuming the leak in the IRF640 is more than likely.
Someone with more experience will probably have to test this hypothesis.
Observation...
For the effect to takes place, the gate must be drive a minimum voltage.
The frequency and duty cycle seems to greatly influence this variable.
The frequency seems to be close to 35-40 khz ... (regardless of certain variables).
That's it for now... more to come.

The experience of Mr. JLN also seems intriguing road.

Thanks,
LightRider

[gotoluc]

Thanks for the reply LightRider

With the IRF640 I can have the gate voltage at 10vpp and still get the effect but as you say the bests results are when lower voltages are used. For me the best results are in the 7vpp range.

@everyone
Here is an interesting scope shot using a 2SK2806-01 mosfet I had salvaged some time ago from power supply I think.

I'm using 12.88vdc as input and the green probe is across my generator input and the yellow is across a 100 Ohm carbon resistor which is in series on the ground side of the generator input.

Interesting to see the sine wave across the resistor. I wonder if it's the generators internal components resonating? At this setting it's sending back -.000043 at 12.88vdc. Also, take note of how low of voltage I can drive this mosfet!... don't think it's not driving the gate as I checked and it is. Since the pickup coil has 0.22vdc on the 1K Ohm load.

This is the lowest RMS voltage (156mv) across the 100 Ohm resistor I got so far with it sending back energy.

What do you make of this?

Luc

ADDED

I added another scope shot where I added capacitance to the toroid coil to lower resonating frequency so now the pickup coil now has .35vdc on the 1K Ohm load (twice the power) without raising the 150mv RMS across the 100 Ohm current shunt and still sending back -.000006