Joule Thief

[jeanna]

@jeanna

Maybe you complicate stuff , a bit . But ABCD are coils , you then connect them in serial pair AB and CD , that is done already , you told me you get 80v per pair, didn't you? Also remember the coil are polarized , not easy to see on cross wind pickup coils ! Since the leds work both way ! (ist mk3 coil video)

Now stop looking at the letters they are there to make a point of using coil from both sides of the toroid to make your pair.

Now to the bridge!

Mark

Well I get 108volts. I did this yesterday which is why I asked for help.

Forget 150 volts. It is 108v. And for proof I get 73volts in a cap within a few seconds and 82volts if I wait for a couple of minutes. 73volts is 66% of the total 108volts.
I think you know why I am using the 66% amount.

That is off the bridge as described in the schematic.

I will now do it one more time and I will exhaust every possibility of polarity just to be sure.

I sure hope this works,

jeanna

[Mk1]

@jeanna

Ok , i will make a mk2 and re test , and get back at you.

Mark

[TheNOP]

@Koen1

the thing about charging/discharging caps is about getting the minimum volts/amps requirement to make something work.

take a 60 watts bulb, it does not require 60 watts to light it.
you might think that this watts minimum requirement must be meet in term of volts/amps per second, it is not.

just like leds, neons, from what we can see from the jt, it take less currents then what the manufacturers tell us it should take to light them.
no power gain here, simply the leds, neons, are not always on, but our eyes don't see it because of the frequency at witch it happen.

take a 10 volts/ .1 uF cap when discharged trough a .1 ohms resistor, how many amps will you get, in  say, in a picosecond ?
hint: a huge amont of amps.

it is all about volts/amps time frame.

all this is even without going into the "young" effect...

[jadaro2600]

Considering that LED's are solid state lighting, then it's not really that surprising that a high voltage bump will cause it to produce as much light as factory statements..etc.

Consider the fact that it produces light when loosing energy, the electrons come down an energy level, or what have you.  Pulsing an LED causes it to do this with frequency, a voltage pulse is most likely a better way to light an LED than a continuous current and a continuous voltage.

There are arguments that this could damage the PN junction, but most LED's, if they're going to blow, they're going to blow, it's only a matter of time, ..that's a very thin lead wire going to the top of that salt-grain sized wedge of semi conductive material.

[electricme]

@Jeanna,
Sorry about that, I went back and took a relook at your post, you are correct.
I had better not post advice when I am tired.

For those wondering about this, Jeanna mentioned in a previous post about a series connection, somehow I thought it was a parallel connection. dumb huh.

jim