Joule Thief

[xee2]

@ kooler

xee2
i put a bridge and cap on the secondarys and it would only charge up to 3.1 volts.. thats with no leds in it..
and the same volts with 4 leds in there..

Very strange. I have never seen 3 volts light a string of LEDs in series. You must have spikes at a higher voltage. I do not know why you are not seeing them.

[altrez]

@ altrez

The drawing of the simple SEC I posted was not correct. Corrected drawing below. I also tried to build this and it did not work for me. I hope you have better luck.

xee2,

i don't have the 10kv trigger coil so I can not test it. However my TDK is still humming along perfectly. i tried a 4kv trigger coil i had here and it did not work. But the coil could be damaged. I just ordered some more. And will grab a few 10kvs from mouser.

-Altrez

[innovation_station]

i just happen to have a

TDK 332P02201 ...

LAYING AROUND... 

look good and hard at how it is wound ...

then i may teach you some real magic ... 

it is an intresting winding config top  coils are trifillar ..  bottom pancake single ... 

: )

stevie way it ? 

i can swing that .. 

it can be a compact device...    we can always drop it in the shrinker ...  : )

[xee2]

@ kooler

Very strange. I have never seen 3 volts light a string of LEDs in series. You must have spikes at a higher voltage. I do not know why you are not seeing them.

Perhaps the spikes are on for such a small part of each cycle that they never add up to much extra voltage. They must be at a a pretty low rate in order to get the low power consumption. That is my best guess for now.

[kooler]

i got me a newer camera coming soon.. so maybe i can get you guys some better scope shots..
i took my portable scope to a guy that has messed with radios for years and he checked it over..
he said it is fairly accurate.. but he said it was very sensitive .. he told me i probably should buy another scope probe to see if that helped ..
i meant to say earlier that if you want to light a led off the battery itself you will need to put a led on the secondary.. it won't pulse the battery till it has a load on the sec.. windings
it goes from 10khz no load to 5.3 khz with how ever many leds i want


robbie