Joule Thief

[nievesoliveras]

@all

I was experimenting with a new toroid I built with what I could get.
The toroid is excellent turning the motor and making the running battery to last a little longer.
But to this moment I have not been able to get a decent feedback to the source.

Jesus

[innovation_station]

a pic of my toy

added the 4 bridges  im gonna put a few small super caps on it ...  to feed back the output

i have 3 super caps i found in my junk 1 from a vcr 2 from shake em flashlights..

2 are .047f  and 1 is .33 f

im hopeing to fill a feed back cap off the jt led side through the 4001 rectifier ... im un concerned with any other out put of this coil right now ...

my goal is to keep all coils and bulbs lit as well take feedback off the coil  i have tryed on the jt side it does not effect to other out puts at all

here is a pic of the coil and the bridges added 

ist

[timmy1729]

@ Timmy1729

Does anyone have any idea what motor he was using in his other two videos? If it is in something
I have at home I will use that. If not, I am going shopping later anyway.

Tried this a while back it is a dc motor with one of its armature pickups broken off.
This causes a dead spot in the armature windings, and gives a pulsing affect of the current from
the battery.

“Note when i did this i used a unmodified dc motor “ so maybe the pulsing has some thing to add
to the setup.

Hope this is what you wanted to know. If so i would use a dc motor i had laying around rather
than buy a good new one

@RAF
Welcome to the thread! That is precisely what I needed to know! Thanks!

@All
I currently have my bigger toroid JT set up as the diagram "Improvements for Efficiency, Component Protection, and Stability." on this page shows: http://wiki.waggy.org/dokuwiki/electronics/joulethief

First of all, that setup is a waste of time. You gain absolutely nothing. You're better off just putting a diode between the collector and the + side of the LED and putting a cap across the LED. So anyway, I hooked up a 3v battery to it to see if it would give any higher voltage. Nope. In fact, the 3v batt(bought new last night) gave me a steady 3.0vdc across the LED. My AA battery gives me 3.2 or 3.3vdc across the LED. So, that threw me for a loop. Why does it do that 

So, I'm going to reduce it back to the simple diode/cap config and then make it like Slayer's diagram yesterday.

Now that I've got all of those 48" fluoro tubes, I've got to find a Fuji so I can light those up. My KODAK won't do it. It puts out a good 288vdc without the 330vdc cap on it. But, it won't light them. Could the flash tube in the board be sucking juice from the circuit? Should I remove it?

[innovation_station]

well i added an avalanche rechargeable battery ...  right off the bridge on the jt led   and well it recharged REALLY FAST ...

but it stops in bout 2min at .95vdc in the battery ...  it had 0 in it when i started and it holds it for quite some time ... so it made no diffrence to the system with the battery on there ..   i guess i will add a super cap there ... and see if i can get the voltage beond .95 ... i know it will 

i did it last night instantly the super cap was charged to 1.7vdc   so that is lots of voltage to feed back to a battery that has 0 -.95 in it

see how this goes


ist!

i just tryed this on another avalanche battery ...  and im impressed .......  in less that 8 seconds the second one is at .9 v   hummmm

on to  the cap deal now

now im wondering if i could run a feed stright through to the battery as i have just done  but also add a cap to it and then have a drain from the cap to the battery .... ??  so soon as the jt turns on it fills the battery to .95 then the cap  can fill too to what evere voltage it can and dump it   or take off both cap and battery so i end up with like 2 volts out of both ...  only if the cap will not recharge beond .95 v

well playing as usual ...  back at it .....

i have decided to put 2 avalanche batteries and 1 .33f supercap on the jt bridge... 

here is a pic of what i will use on the jt led bridge

[timmy1729]

http://www.magnet.fsu.edu/education/tutorials/java/ignitioncoil/index.html

Speaking of BEMF, this is a very simple introduction to the induction in Tesla coils and ignition coils. Even I understand what it shows