Joule Thief

[sparks]

  Yucca

  If we take two speakers like the ones the kids are kicking around the living room and we bolt them together.  When one speaker is driven the second speaker will generate.  If the generated voltage is stored in a capacitor that is resonant with the speaker coil then the receiver speaker will ring down.  As it is ringing down electrically it will be moving mechanically.  The speaker upon which the initial pulse was imposed on will now be generating an echo of the original input.  I think it would be best to put a sawtooth signal into the first speaker as it is rich in harmonics.  You can go with the spike also.  If it doesnt work the kids can use it to play spaceships with or something.  They can put it on it's edge and use it for a top also.  The magnets will be spinning around  oh here I go again.

[Mk1]

@jeanna

I am beginning to think cardboard tube are better .

Now i have posted 4 different example of coil all have different jt coil numbers .

When i made the first one , my mind set was , since you could make jt with nothing but wire given that you have enough it will work .

Then prototype one , first picture. 18 turns 3 revolution , angle about 15 degree 1v output per turn of secondary.

Second prototype ,next picture, i tried to space the winding and put some more turns , 11 turn base , 11 turn collector , 45 degree , pickup coil 22 turns . Those modification raised the voltage.

Next picture , i wanted more turns , and revolutions , my aim was 36/36, never got it right , so i ended up with 18/18. This raised the volts and is basically the one showing all the filament and motor running and in the movies . 3 turns per revolution at 45 degree.

You don't need to go further this is the one ...Then i was happy ...

I changed the windings on the second prototype forth picture.
Worked great too.

Then got back at prototype 3 , i really wanted 36/36 total 72 . So i made 2 more jt coil , I DON'T USE THEM AT THE MOMENT , i broke my bulb , i will resume the coil exploration when i have i new bulb . ( but so far the bulb got brighter when i added a second coil in series on the base , but no change on the collector.

So i give you , no definite numbers because all tubes are different , and if you can't cut it then you can't really replicate correctly , plus real replication needs cardboard tube .

Also the little one is the 5 laps per revolution with the green wire i got 15 revolution in so 5*15 , but on the copper coil 5*24 so 24 layer pancake .
it is just connected to the led , it also light white one easy , i did not show it because the red one starts lighting at 1.8v it makes it more precises , it can sense weaker fields.

I hope this helps , for all its worth it works almost identical to a regular joule thief , but i feel this one is more powerful then any i have seen or made before.






   

[innovation_station]

PAGE 808 BABY! 

: )

THE FUN HAS YET TO BEGIN !


im just kicking a few to FRONT STAGE ...


wakie

AND GADGET

is always welcome as are all !

i always for give ...  but i will make a point of you first !

regards!

H

cuz we bee rocking rythem till the DISCO breaks!

as in  well  ... 

let you live it ....  : )

[jeanna]

@Mk1

Thanks for this nice review.
I understand you like the last one best I mean the one withthe 6 turns of white and blue secondary??.
Do you think the secondary inside makes it any better?

thank you,

jeanna

[Rosphere]

Thank you to jeanna, Mk1, xee2, crowclaw, stprue, kooler, and others who have all worked hard to make clear, informative, technical posts, which allow others to replicate your work, learn new things, and practice new skills.

I just replicated crowclaw's latest offering, (the Helmholtz-coil looking air-core JT.)

I got two white LEDs to burn bright at several inches above the lower coil assembly, (which ran off a 1.0V AA battery.)

I wish I had not lent out my 'good' camera, I would like to show a few photos.