Joule Thief

[jeanna]

OK this will be today's last pic.

It has 10 turns on the secondary - not because the lights went out, but because I turned the remaining bit of wire.

and 15 leds being run off the main jt which has 1 led itself.

some specs.
red led V_f is 1.8V
Amber led V_f is 2V
white led V_f is 3.2V

Reading voltage from the first in  series to the last in parallel shows 7.6V on the dmm
I am using a AAA with a 1.25 v reading.

Jeanna

PS Thank you MK1
and thank you xee2.

[electricme]

@ amigo
I found the web site to download the Light Emitting Diode Information
For those who would like it, here it is

     http://www.mediafire.com/?z2i4niwyf2y it is 18megs in length, the other is http://www.mediafire.com/?md0itlk5dgi

I also went to http://www.mediafire.com/?4qemem5nmzn  this is a 8meg file carnt remember what it is about.

Fancy forgetting what the file is Jim? shame on you, slack man, lol

jim

[Pirate88179]

   But Pirate, I thought all PI's had secretarys to do all the paper work for them.

That is why I flunked out of being an office worker. I was made a file clerk and that
lasted about a month and I told them to shove it. Got to get my hands into things
that work and move.



thaelin

I hate the paper work!!!!  but, we all have it and no....I do NOT have a secretary....I wish many times now that I did, ha ha.  When I was in the ceramics business, I had 3 secretaries.....those were the days. (sigh)

@ all:

I am attempting here to get caught up on my post replies. If I leave anyone out, it is not on purpose.

OK you know what?  Forget it.  I just went back over 5 pages of posts and there is no way I can respond to all of them without increasing this topic another 2 pages.  So:

To: (in random order)  Mk1, Jim, Timmy, Jeanna, Gadgetmall, Thaelin, Cap-Z-ro, Wilby, amigo, Xee2, thank you for all of your posts.  I still have a lot of links to follow and I will.  I am still watching the videos posted by Mk1 and they are very helpful.  Some of the stuff I knew, most I did not.

Jim:

You are down there experimenting your butt off!  I know we all appreciate it.

Jeanna:

Thank you for posting your duration results with the AA battery.  That was important stuff and goes toward what my electronics guy keeps asking me.  "So, you can light 400 LEDs....BUT, for how long?"  How long my butt!  I just can't believe we can light all of these tubes, leds, what have you, for any length of time on a single AA!!  Your information will be very helpful to me for when I speak to him next.

This topic is moving so fast I hope that no one feels left out or ignored.  When I posted that I had lit 400 leds, only 3 folks responded that they had seen my post.  I know more saw it, but they were busy with what they were doing at the time and I know how it is.  I missed Jeanna's post where she lit the tubes AND the leds and did not comment on that until like 2 days (or pages) later.  Jim has done so much here that I don't know if I will ever be able to catch up.  I did see where he got zapped though, and this makes me feel a little better.  Not that I want him to get zapped, but I have zapped myself so many times, I like being in good company.

Take care all.  I have a lot to think about for when my breadboard gets here.  VR's, secondary windings, multi toroids.  At least I don't have to worry about living alone and being bored.


Bill

[AbbaRue]

@MK1
You stated:

"My multimeter must not work well because a got 8 led in parallel fully (thats all the led a got)lit on a brass wire the don't show ac or dc on it , i would need a scope to see but i don't ,really weird .I am having a hard time getting that one."

Could explain this post a little more.
What do you mean by the Brass Wire? What did you find special about using Brass wire instead of Copper wire?
Are you using just one wire going to the LED's ?
Please explain your setup about this one a little more. Thx.

[Mk1]

@Abbarue

Thanks for asking , i was doing some test as we speak, I went to the hardware store and bought 2 types of wire a 20 gauge of brass and 20 gauge aluminium to try to make pickup coil , they would need to be properly isolated but i tried to make sure they would not touch , i did 7 turns , on a regular joule thief, I tested it on ac and dc , tried the bridge , it was giving me like under a volt ac or dc , but i still tried the led it did not work then turned it around and voila , led works that's all i can say i added up to 8 leds to it just as bright. Now i am trying 1 turn of brass , so far one led works , there is only voltage when led is on 1 volt.