Joule Thief

[stprue]

@ jeanna

I did not have a 30K resistor so I put a 50K resistor in series with the neon so that we have closer to the same thing. The neon lights brightly with a 500 ohm base resistor and only lights half way up when I add the 50K resistor in series with the neon. I will add photos later.

I think you said the MK1 would not light neon with a 500 ohm base resistor. To me, this would indicate that the MK1 coil is not providing as much power out as the solenoid coil. Does that seem like a reasonable conclusion to you?

Photos are with 500 ohm base resistor. Sorry about the blur.

This is why POT's are soooooooo important for tuning.

[xee2]

@ jeanna

I redid the photos using a 33K resistor in series with the neon so we should have almost identical test setups except for the pickup coils. With the 33K resistor in series with the neon it lights about 80% of its length when using the 20 turn solenoid pickup coil and a 500 ohm base resistor.

[innovation_station]

stpure ...   

i love your coils a wonderfully wound unit ...  i just love the left hand aproch




it has worked well for me .. 

every step we all take are a part of the devine plan 

congrats to you all! 

now if i can get you to put your rocks on next  we all get the next level visual 

ra hahahahahaha 

ist!   seeking ballance within each and every one that walks ..  up right ... lol

[nievesoliveras]

@all

Now I am on the place of the child that cried wolf too much.

I unwinded the bar ferrite coil after marking one wire by bending it.
I bended the wire that goes to the transistors base.

But when I finish unwinding, I noticed that both wires are not grayed but yellowed on some parts along the wires.
That is more confusing to me.  Maybe it needs the same lenght but with a thicker wire.
I just dont know, because I made a toroid last week and I used it today on the charger circuit and it gave no good sign.

This charging force comes strong one day and make me cry wolf wolf and then disappear.

I will follow @gadgetmall version of my diode configuration to see if I can rest from this wolf crying.

Jesus

[Mk1]

@stprue

I got this picture , try this one , but basically the problem is that you cross over 2 rows of wire , it dose look nice , but you cant put as much wire on the toroid.