Akula eternal lantern 4

[Void]

I think I have now figured out how to get those slow exponentially rising scope waveforms
that Akula was showing on his Collector. I am using a FET, but it seems to me that my
waveform on the Drain of my driver FET is now pretty close to what Akula was showing.
What do you think guys?

I am pulsing the coil with 3VDC.

All the best...


P.S. I made a typo in the original file attachment name. I originally wrote exponential rise on 'Gate', but the
waveform is actually showing the exponential rise on the Drain of my FET. I have corrected the attached filename now...

[d3x0r]

at 9:06 he adjusts the frequency up; approaches 500hz (2ms) ... looks like 425

[d3x0r]

I think I have now figured out how to get those slow exponentially rising scope waveforms
that Akula was showing on his Collector. I am using a FET, but it seems to me that my
waveform on the Drain of my driver FET is now pretty close to what Akula was showing.
What do you think guys?

I am pulsing the coil with 3VDC.

All the best...


P.S. I made a typo in the original file attachment name. I originally wrote exponential rise on 'Gate', but the
waveform is actually showing the exponential rise on the Drain of my FET. I have corrected the attached filename now...

Yes I agree that looks similar.
what's the trick?

[Void]

Agreed, the HD video rendering from post #2 confirms this,  250Hz:

Regards itsu

Thanks for confirming Itsu.

[d3x0r]

I don't understand what happens here
http://youtu.be/DnuXqnTlJNM?t=9m25s
It doesn't appear to be a cut... he in increasing the voltage from 2.0V to 5.0V, and seems to click again to get 5.0V and then 10.0V but between the 5.0 and 5.0, the curve flattens out.  the negative basically totally disappears, and it becomes flat on the top... and then at 10:00 he's expanding the time, and there's no significant low dip...  and then by 10:15 he increases the voltage sensitivity again and the curve returns.... scope internal capacitance change?