Overunity motor, part3, all 4 recharging bats reading at 1.400 volts now.

[MarkE]

There is a disconnect with Sm0ky2 where he doesn't understand that the method of excitation for the coil in a Joule Thief is not even related to a method for finding the self-resonant frequency for a coil.  He is also blindly believing the generic catch-all phrase that "resonance make the circuit more efficient" and applying it to a Joule Thief.

Sm0ky2:  With a few months of diligent study you will be in a better position to appreciate this.

It's a pretty much a put up or shut up situation for him.  Anyone can make claims.  Providing evidence for those claims, that can be another matter.

[MarkE]

So i threw together a quick cool joule circuit,just so as i could have a look at it with my digital scope.Below is the slightly modified circuit(D1 removed),and a scope shot. The blue trace is across emitter/base,and the yellow trace is across emitter/collector. I am useing two identical solenoid coils from an old washing machines water valves-->both have the steel core removed,so as they are air core now. I have changed the transistor to a TIP35C. Looking at the scope,it seems that the transistor is switching on with only 480mV

The LED / B1 branch just load the oscillator down.  I've got my measurements and simulation in pretty close agreement now using the parts I listed.  The base current is pretty much a sawtooth.  It takes a big jump on the falling side of the collector voltage waveform and then ramps towards zero, where the collector voltage pulses upward and then collapses as L2 discharges.

If you are using your scope probes in X1 mode, you should change that to X10 mode.  It will reduce the loading effects of your probes.

[tinman]

  This tells us that Tinman was right that Miller capacitance is the energy source.  The Miller capacitance reacts with the large inductance in series with the base to drive these oscillations. 

The last scope shot is the collector and base waveforms with the LEDs open.

I am learning--> i have great teachers.
TK & MarkE
Thanks for taking the time to check it out.

[tinman]

The LED / B1 branch just load the oscillator down.  I've got my measurements and simulation in pretty close agreement now using the parts I listed.  The base current is pretty much a sawtooth.  It takes a big jump on the falling side of the collector voltage waveform and then ramps towards zero, where the collector voltage pulses upward and then collapses as L2 discharges.

If you are using your scope probes in X1 mode, you should change that to X10 mode.  It will reduce the loading effects of your probes.

I have switched the probes to 10x,and i dont see much difference in the wave forms,but the voltage across the circuit has risen some. I set the voltage on each channel to 100mV/PD,and dropped both channels down one devision so as to fit the whole wave form in the frame.

[minnie]

  To the likes of Floor and sm0key,
                MarkE , TK, MH  etc. are trying to educate, read and learn before making
   comments, everything they say can be verified. If any of them err and you point
   out they'll retract or amend as necessary, we should all be on the same side!
               John.