Joule Thief

[jeanna]

Hi Bill NOP etc,
Thanks for the help.

I find this a bit like disecting a cadaver. I want to see what is happening with this thing when it is alive (the scope shows a lot of activity) and the best the experts can give me is a frozen section of a cadaver.

You do realize that after the cap is full I then need to recalculate using that RC formula and ohms law to extrapolate how much activity must have been going on to allow the cap to fill under those conditions.

There are a lot of assumptions going on here. I think there is a less convoluted method. At lease, now,  I am pretty sure this is all that is out there and I haven't missed it.

thank you,

jeanna

[stprue]

@Mk1

I just re-read pg 478 and according to your turn ratios say 20 up 16 down you must be skipping some is this right?

[TheNOP]

I find this a bit like disecting a cadaver. I want to see what is happening with this thing when it is alive (the scope shows a lot of activity) and the best the experts can give me is a frozen section of a cadaver.

You do realize that after the cap is full I then need to recalculate using that RC formula and ohms law to extrapolate how much activity must have been going on to allow the cap to fill under those conditions.

There are a lot of assumptions going on here. I think there is a less convoluted method. At lease, now,  I am pretty sure this is all that is out there and I haven't missed it.

one thing that might not be obvious is that the resistance can be replaced with led(s)

a resistance in parallel with a cap is a filter, when in parallel to the source.
since the pickup coil is connected in parallel to the cap and the resistance, it is a filter, not a RC circuit.

you, we, want RMS values whenever possible.
RMS values = DC values

the above pickup|cap|resistance trick can provide us with fairly accurate RMS measurements.

to get the watts or current you only need to know the voltage and the resistance.
W = (V * V) / R
I = V / R


i just found a good link for you all.
Ohm's formulas

[stprue]

If this is right I think I finally have it

[jeanna]

If this is right I think I finally have it

I think you have it!
hooray!

let-r-rip!

jeanna