Joule Thief

[RAF]

Well it has been a while for me!
When this group was only a couple of hundred pages long,
an event beyond my control took most of my spare time.

Nice to see the group still going “ffeuuu” lol
it is a long read to catch up.

@ jeanna

I remember you mentioning the cone shape a while back,
and I too think that may be the ticket.
I like to think of the vortex,
after all it is all around us in nature.
I also like working with the Joule Thief
because it is a simple way to oscillate a conductive coil.

Anyway I at the risk of over stepping my bounds,
I thought you mite like to look at this site if you have not already.
I seem to end up at it with a lot of my Internet F-E search requests.

http://jnaudin.free.fr/html/torsion.htm
http://jnaudin.free.fr/html/tripole.htm
http://jnaudin.free.fr/html/magvtx.htm

now that the weather is again changing  “and it seems to soon”
I should have some indoor time to play around with this again.

congrats to all some interesting stuff going on.
Long live the JT thread, nice going Pirate Bill

p.s. i love the rug jeanna

[Pirate88179]

@ RAF:

Thank you sir.  Welcome back.

Bill

[innovation_station]

welcome RAF!


it seams like i should know  you .. but i cannot say i do as your name RAF!

NONE THE LESS

WELCOME BACK!   IT IS MUCH APREACIATED YOU JUST ABOUT TOUCHING ON BOUNDRIES

THIS IM SURE WILL AID THINGS ALONG THERE PATH...

some things seem too soon and others not soon enough ...

perhaps our orbit in space is actually decreaseing ... hence our year changeing .. the weather does seam odd ... 

well theres a few things i could mention that might spur some intrest .. and i wonded what may be the effects on earth there of ?

first question ...  what might the quote from the bible mean ...  GOD WILL SHAKE THE EARTH LIKE A HUT?

this has tumbbled round my mind from time to time ...

i do infact have an answer .. RESONANCE! 

ill leave it there ...

ist

and kooler   SHOUT THAT ... NEVER FEEL LIKE YOU ARE BOTHERING ANYONE OF US!

THIS IS AN OPENSOURCE TEAM ... APROCHING PUBLIC ORGANIZATION ... OR TRYING TO ... LOL

BUT  WE ALL HAVE A COMMON GOAL AND IT ONLY MAKES SENCE TO ALL WORK TOGATHER TOWARD OUR GOAL...

[xee2]

@ kooler

any suggestions

You probably know as much as me about this, but, LEDs are damaged by even small reverse voltage levels so it is always best to put a rectifier diode like the 1N4007 in series with the LEDs to block any reverse current.

I am still waiting for my SCRs to be delivered. Lighting a filament bulb seems impossible. You must have a really good transformer to be able to get that much continuous power out. The problem I have had is that the Joule thief puts out pulses of high current. These start to heat up the filament but it then cools off again before the next pulse and so the bulb never gets bright. LEDs turn on very quickly so it is easy to get them to full brightness within the duration of one pulse.

[innovation_station]

SPARK GAP ...  HV  AND A LOWER VALUE CAP

IST