Joule Thief

[weri812]

hello to all

love this group  lots to learn  made my first jt from scratch.
willing to learn more.

thanks to all  and keep up the good work.
will keep working all so.

God Bless

wer

[innovation_station]

weir my friend ...  great work !!


im glad you have come to join us here soon the rest will find there way as well 


nice job!!

ist!

ok im on the ring now ... i will take pictures as i compleate the steps ...

peace to all !!

[Mk1]

@weri812

Welcome , we need all the help , we can get , if you have any question please , ask them. You will most likely get more then your waiting for , This little gadget has more to give!

Nice work on that Jt.


Mark

[electricme]

@all
Hi guys, I'm doing ok with my big torid setup, I left it on overnight, checked it this morning and it was discharging.

OK put a fresh 1.2v battery in this thing, it began to work again.
After a while the 1.2 NiCad goes down, hmmmm do some more thinking, why is it working but going flattttttt.

When a fresh 1.2 batt is put in, it shows 1.30volts on a meter I have placed directly accross Pos and Neg.

I have a meter placed directly at the big NiCad wet cell, this shows >1.20volts it has been >1.30 volts.

But if the 1.2 AA batt discharges, so the output of the torid goes lower, as is expected, but the 1.2v NiCad wet cell, dosent seem to be holding a charge.

Then the penny fell, the 1.2volt nicad wet cell had not been used for years, so I tore apart a old torch, removed the bulb and used this accross the wet cell nicad as a resistance discharger, the bulb gave out a very week light then inside of a minute it extinguished.

Then I put another fresh AA 1.2v nicad batt back in, this time I connected the resistance bulb back in accross the big 1.2v nicad wet cell battery, turned the JT on and away it went.

The whole setup has been running for about an hour, the big 1.2v wet cell nicad seems to be charging up from the AA 1.2volt nicad.
I hooked up the small torch bulb and it glowed, but it seemed to gradually get brighter, but it is operating at half its voltage as it is a 3.6v bulb.
I hooked up another bulb in parallel, it glowed weekly, as it is a 6v globe.

To really test this big Torid, I will see if it can charge up 2 X 1.2volt wet cell NiCads in series = 2.4volts
If it can do this, then I'm on the right track, havent got to OU, if I can keep the wet cells NiCads charged up and return excess power to the original 1.2volt AA NiCad batt then I will be getting closer.



I need a break from this thing at the moment, I will post some photos soon (in a few hours) and its circuit in several bits.

General Jim

Photo 0420.jpg = scope image waveform, probes connected to DC at bridge rectifier, before it goes to big 1.2v wet cell NiCad battery.
          0421.jpg = close up of scope waveform.

          0417.jpg = Batt AA voltage on left multimeter
                          Batt voltage after bridge rectifier, before it enters 1n4004 diode at Positave Post
          0425.jpg = Meter accross main big cell, showing 1.25volts and riseing

               

[electricme]

@ Weri812,
Welcome to the Joule Thief forum, just throwing the welcome mat out to you.
Nice to have you aboard, were all a crasy lot here,     love to push normal thinking to its limits and beyond. lol

Nice JT, nice tight neat turns, I see it's been running almost 24hrs, is a good result, well done Wer

I'm off to the dump to find any good stuff I kan use on this JT ha ha

General Jim