Joule Thief

[xee2]

How to test to see if a battery is fully charged.

[innovation_station]

ILL TELL YA HOW TO REALLY RECHARGE EM FROM ANY JT ... 

LOL

ill be demoing this soon ..  i will use 2 old cel fone batteries ...  i will charge them from a jt i will keep them in the unit  ...  i will bleed off them to a super cap ... and feed the rechargable aa batteries some juice ... 

and charge them in a usual way ...  and use the usual power ...  just needs a shut off and if i ever get luckey to get some more big cores ...  this will be a side ... note .. lol

this unit will have a bridge rectifier off the jt to the cell fone batteries ...  then i will re bridge from the batteries to the supercap ... as some ripple still comes through this is a good thing .. because ... when i charge the cell fone batteries ..  and they are fully charged ... they will over flow to the super cap ...  and drive the voltage higher in it .. i have been able to charge celfone batteries in the past no problem and then burn leds normally useing 40 ma or more at 3.7vdc  with out lose or depleation from the cell fone bateries  INFACT IN SOME CASES THEY WERE CLIMBING IN CHARGE EVEN BURNING THE 3.7VDC 50 MA LOAD ...  or what ever it was i for get now that was hundreds of tests ago lol

W

in all the stuff that has been going on in the last few days i forgot to tell you about my cool effect i found  lol  with my  wjt transformer unit ... 


o yes it only squeils when i change its orentation ...  lol  thats all  ; )  thats odd i went to video it and it dont do it ... hummm   might have been a loose wire ...  i will have to try it agin

it was a loose wire ..  but ...  now i hear a verry faint harmonic ...  at a certan angle first i thought cuz i was moveing it too fast but then i found a a spot and i can move it slow and i here 2 diffrent tones ... 

verry intresting .....   hummmmm   

[crowclaw]

@ crowclaw:

Nice job!  What are you powering that with?  It looks good.

Hi Bill,
It's powered by a single AAA cell, the circuit is as "JT" although the transformer was donated and most probably either from a disposable camera or hand held bank note checker. It was something I through together a long time ago for a laugh and never ceases to amaze... Ha Ha "LOOK NO WIRES"   

[gadgetmall]

i also notice the same thing and when you get past 270 turns it starts to kill your voltage...
lol.. i went to 732 turns to get only 74 volts,,, so i was like what
unwind 3 layers and boom... 632 volts

oh do we know what diodes tysb3 is using on feedback

Hi . I had Learned from My test with multilayer coils exactly the same . In actuality only the first layer is the most effective thus if you can wind 600-1000 turns touching the toroid this will produce way more volts than if you would the same amount of turns with say , bigger wire and multilayer . Also if you wind Mk1's style which is wind up then reverse down the wire is still touching the toroid and is considered one layer because the proper way to wind his method is go between each wire thus they are still one layer  !  Am i the only one who wound 600 one layer on Jeanna light toroid ? It is Super bright Cfl light with 600 . the next one i will go with number 30 wire and try for 2000 turns single layer ,insulated core with acrylic paint , then coat the coil with clear coat and finally dip in latex rubber .. I noticed no one commented on that Jt Video . I guess it was way  too normal and just a waste of my time showing it - : )

Have a holly jolly Christmas !

Gadget

[crowclaw]

@ gadgett,

Can you draw out a schematic diagram so I can see clearly what you are doing.
@ all
The JT circuits have proved very interesting to experiment with, the results can be unpredictable. You have to juggle with core materials, windings, base resistors and transistor types all of which affect the results. Unless you have oscilloscopes to analyse your results it is difficult to predict a precise outcome or wether the circuits are stable! hence harmonics and frequency spikes reaching into RF frequency spectrum's.  All good fun.