Joule Thief

[TheNOP]

I say things I got from reading the lectures, and some people think I don't know what I am saying.
I don't,
but since it is coming from tesla, I trust he does.

...

you understand what he said base on what you know.
we all do the same.
for example: you see a sparks gap where i see a simple switch.
to me, a spark gap is far from producing the smoot current an alternator can produce.

in my reply to Altrez
http://www.overunity.com/index.php?topic=6123.msg185934#msg185934
the first part explain what will happen in a transformer in specific cases of having too many turns.
no matter what is the frequency.
if it don't change with the ratio, then what i wrote will be true.
sure, the highest possible frequency is limited by the core, but it will still be true if the frequency is within the core limits.
the same apply to a jt with pickup(s) in regard to the turns of the pickup.

the second part deal specificly with the frequencies.
what i wrote is the same things Tesla wrote, i can't say different.
what applied in Tesla times still apply today.
the only difference is the words used to describe the behaviors.

i know you are trying to understand how the jt, as a whole, is working.
but without knowing the basic of what can happen, you can be misleaded more easily by the measurements you are taking.
sure, seeing a circuit as a whole is important, but the details are also as much important.
without the details we can't figure out if it could be made an other ways, better way(s).
without knowing what is happening, you will not be able to easily work around some of the limitations you might encounter during your experiments.

it is a bit like if i was giving you a black box with connectors on it and ask you to tell me what is inside it, and why you think it is what you will say it is.
the answeres you will give me will inevitably be based solely on what you know.
it can't be different.
you will be able to give me some informations on the behaviors of what is inside.
but you probably will not be able to tell me what is inside.
unless you already know something that behave like it.


btw
disruptive discharge = insulation breakdown
usually due to an "abrupt" ?, sudden and large increase rise of current.

fluorescent lamp are disruptive discharge devices, the gas inside is the insulation that get broked.
their ballasts are resistive transformer, to limit the current so they don't blowup.

[Mk1]

@all

lidmotor did it again !


http://www.youtube.com/user/Lidmotor

[altrez]

Hi Altrez,
I am not doing that anymore. I wanted to do the deal with a hand wound toroid and not rely on a manufactured product, so, I still have 1 unchanged in any way and one that has a blown part, but the motivation is not there. Are you using gadget's mod? I could make one of mine better using that mod of his.
Yes, 24 hours is what you will drain from the battery because the transistor is there. The leds take so little that you are pretty much down to the transistor use.


@Gary,
nice pics.

jeanna

jeanna,

yes I am using the gadget mod and it works great! It works with the AAA fujis as well. And like I said you can easily run a 13watt CFL for 10-12 hours with his mod.

Like you, I want to use the toroid as my main device but I am moving in the direction of lighting at least 6 CFLS and 100 LEDS from the toroid. And I believe the only way to do this is make 6 to 8 small pickup coils and then use the pickups to power other step up transformers or motors.

I also posted some time back of adding more toroids to the pick up coils. This works as well. The key with that is finding and pushing the right frequency out to the next toroid attached to the system.

I am still not sure how to observe the changes in the core of the toroids magnetic field. I believe a Hall probe or something like that might help me understand more about what is happening in that respect.

There is way more happening inside this circuit then I can see with a scope / meter. The amount of EMI being produced is one thing. I plan on getting a meter for testing that.

I am also looking at a LUX meter to document how bright my lights are from the toroid to one that is plugged into mains.

Take care,

-Altrez

[the_big_m_in_ok]

@all

There was this circuit that @mk1 posted here:
http://www.overunity.com/index.php?topic=6123.msg185652#msg185652

I changed it so instead of charging another battery or cap, it feedsback to the source. ...

@all,
I've thought of a variation in power recovery of CEMF  using two polarized capacitors wired end-to-end with diodes:


        |--->|---|
        |            |       
        |  +| /    |
        |---||---|
        |    | \    |
-----|            |-----
        |    \ |    |
        |---| |---|
        |    / |+   |
        |            |
        |---|<---|

I can only draw this on the keyboard in ASCII, since I have no graphics software available on this borrowed computer.

You might put this in series either or parallel across your JT transformer, since polarity would not be an issue.
(Now that I 'Preview' this post, it looks fairly good on the screen.)

Comments?  Suggestions?

--Lee

[nievesoliveras]

Jesus

I think   if you solder  up  at least   a few parts that  you can use  alot your  stabilty will improve .

I think that that is a good solution to the contact problem.
I saw a picture of your charger while reading backwards looking for a link and it is something that looks solid.

I dont see the parts involved in it though.

@free

I saw your four videos and found that you have good craftmanship on your work. Well done!

@all,
I've thought of a variation in power recovery of CEMF  using two polarized capacitors wired end-to-end with diodes:


        |--->|---|
        |            |       
        |  +| /    |
        |---||---|
        |    | \    |
-----|            |-----
        |    \ |    |
        |---| |---|
        |    / |+   |
        |            |
        |---|<---|

I can only draw this on the keyboard in ASCII, since I have no graphics software available on this borrowed computer.

You might put this in series either or parallel across your JT transformer, since polarity would not be an issue.
(Now that I 'Preview' this post, it looks fairly good on the screen.)

Comments?  Suggestions?

--Lee

To draw anything I use paint. Just go to the task bar and choose accesories then paint and you have a very good graphics program to work with.

This replication of your asccii graphic idea is made with the windows paint program copy and paste feature.

Jesus