Joule Thief

[xee2]

@xee2,
I keep failing to find the information.
I can get close.
Maybe you can help.

How many coulombs or is it joules are in that 1pF that is resonating at 1Mhz?

thank you,

jeanna

One Coulomb is an amount of charge (electrons), you can look up how many.
One amp = one Coulomb of charge moving through a cross section of a wire per second
or the Coulomb is another way of saying the number of electrons flowing in a wire.
Measure the amps and that is the number of Coulombs moving through the wire per second.

I hope that helps.

[jeanna]

One Coulomb is an amount of charge (electrons), you can look up how many.
One amp = one Coulomb of charge moving through a cross section of a wire per second
or the Coulomb is another way of saying the number of electrons flowing in a wire.
Measure the amps and that is the number of Coulombs moving through the wire per second.

I hope that helps.

Thanks xee2,
It is close, but there is one more part I know gets fit in there but I cannot work the connecting link.
The farad
the pF
how many coulombs will be in the theoretically full 1pF cap?
or 1F for that matter?

thanks,

jeanna

[WilbyInebriated]

the wiki explains it pretty well.

"A farad is the charge in coulombs a capacitor will accept for the potential across it to change 1 volt. A coulomb is 1 ampere second. Example: A 47 mA current causes the voltage across a capacitor to increase 1 volt per second. It therefore has a capacitance of 47 mF."

1F=1C/1V

how many coulombs will be in the theoretically full 1pF cap?
or 1F for that matter?

thanks,

jeanna

if your theoretical cap is a 1V/1F and is theoretically full, it should theoretically contain 1C. if the cap was 1V/1pF it should theoretically contain 1pC... theoretically of course. personally i dislike it. it gives the impression that electrons are discrete particles...

[sirmikey1]

Crowclaw,
   I'm trying to duplicate your double diode JT (attached).  Saw the scope shots, seemed doubled-up and without spikes.   Can you please enlighten me as to the advantages or purpose of your JT mod?  I added the diodes and am seeing 12.3v there, very clean clear measurement for a change; and kept plowing under load.  I don't yet have the added wire with the two resistors in place; or bypassed; as  r2-r3 optional leaves me confused, circuit either shorted or with an extra wire.  Please pardon my green here, peculiar for me too, just curious as to what you've got there. 
Thanks in Advance,
Mikey     

[slayer007]

@ slayer007

I suggest you try this circuit (but I make no promises).

Hello Xee2
I have tried the ciruit your showing but without the 500k resistor.
I was using a 1k resistor but I will try it with a 500 k also.
Also once this is started you can remove the resistor and it will keep running.
It works great with the mass on the tower.
The mass will resonate with the coil extending the field around it.
Like Dr Stiffler says whats mass got to do with it.