Joule Thief

[resonanceman]

:

Have a look at the above video.  This fellow says that we can double the amount of back emf by using a few tricks.  This may well apply to our research here.  Check out his other videos as well because he explains how this works.  See what you think and let me know.  Thanks.  http://www.youtube.com/watch?v=zP4dfxXhxxg&feature=channel  This video, he charges 4 batteries with only 2 batteries.

Bill

It looks to me like  this  same thing  can be done  with a JT

As I understand it  the  motor  serves  as a  small coil and   a source  of pulses.

A   JT  creates pulses    alot  faster than the motor  , If  the  JT was  pulsing  a small coil  placed where the  motor  is in the video

Anyone  have any ideas  about  how to tune  the  extra coilI ?
I am thinking  that   a coil  wound  the  same  as the JT   coil  should be a good place to start



My idea  would  be  kind of  like the  darlington  idea ......except rather than  a pair  of  transistors  it would have a pair  of coils

I think  it  would run kind  of like the  circuit  in this thread.
http://www.overunity.com/index.php?topic=3972.0



gary

[Koen1]

@all

this is a quote from this great link http://www.gutenberg.org/files/15617/15617-h/15617-h.htm


Current and Voltage Ratios. In a well-designed induction coil the energy in the secondary, i.e., the induced current, is for all practical purposes equal to that of the primary current, yet the values of the voltage and the amperage of the induced current may vary widely from the values of the voltage and the amperage of the primary current. With simple periodic currents, such as the commercial alternating lighting currents, the ratio between the voltage in the primary and that in the secondary will be equal to the ratio of the number of turns in the primary to the number of turns in the secondary. Since the energy in the two circuits will be practically the same, it follows that the ratio between the current in the primary and that in the secondary will be equal to the ratio of the number of turns in the secondary to the number of turns in the primary. In telephony, where the currents are not simple periodic currents, and where the variations in current strength take place at different rates, such a law as that just stated does not hold for all cases; but it may be stated in general that the induced currents will be of higher voltage and smaller current strength than those of the primary in all coils where the secondary winding has a greater number of turns than the primary, and vice versâ.

Yes, that sounds like the standard "law"...
What I find most interesting about the passage is the remark about telephony;
I suppose this refers to the seemingly chaotic interference patterns that led
to the discovery of fractals (Mandelbrot?), which was a direct result of a
study into these interference phenomena in the phone lines.

What's missing? I'm not sure... Do you mean they don't mention self inductance
(emf effects) perhaps? Surely that phenomenon is also described on that site?

@all: I pulled apart a little DC motor and ripped one of the three prongs off
like the guy in the "charging 2 batteries from 1" youtube video did to turn
it into a pulse motor. It runs a bit unsteadily but it does run, and according to
my multimeter produces 30kHz pulses (give or take a few kHz).
I thought this interesting as my meter says the modified camera curcuits
I use to play with CFLs also produce a frequency in the same range.
Have not yet built the simple 6-battery setup the guy shows so I can't
attest to the "splitting the positive" yet, nor have I tried hooking a JT up
to either input or output side of the motor yet. I have noticed that the motor
slows down and often halts when my meter probes are attached, while
it doesn't when the meter is not hooked up, so the meter seems to mess
up the pulse action a bit...
Anyone for some suggestions? Always welcome. 

regards,
Koen

[innovation_station]

i have tackeled the tuneing ...

and i discover with my cores that if i drop 1 turn on my jt my volts go to 16.35 vdc through the crystal bridges..

and i can turn it any where in the 1k -0 range and it does not drop below 16vdc as well my jt led is bright ...

i used in this new ring for tuneing the core a 3 turn jt and 7 x 7 mk2 secondary inter twined ... 

ist

my last unit b4 this one is draining the secondaries right now after runing 8 hours..  on that duracell the secondairy batteries were fully charged ...    i have been burning 6 leds in the units for 2 hours now and they are still bright ... 


they were charged with the 4 mk2 secondaries off my jt ring ... the secondaires were putting out 4.20 vdc 

in the new one there 16 vdc ...  new should charge quicker 

[resonanceman]

I have noticed that the motor
slows down and often halts when my meter probes are attached, while
it doesn't when the meter is not hooked up, so the meter seems to mess
up the pulse action a bit...
Anyone for some suggestions? Always welcome. 

regards,
Koen

Koen

do you  have anything  on the shaft  of your motor ?

In the video  he had a good sized  white rectangular thing on the  shaft .
At  first I thought  it was just to make the   rotation more visable .........but it is much  bigger than is necessary for that ......I am thinking  it  is  working as a flywheel .   The  pulsing   is what is needed from the motor ......The mechanical power  it puts out  is no longer important .

gary

[resonanceman]

Double  post deleated