Author Topic: BWJT (Read 56003 times)

jeanna · « **Reply #30 on:** September 21, 2010, 08:09:06 AM »

Well robbie,

I guess you got the brightness with 27mA.

Excellent!

jeanna

kooler · « **Reply #31 on:** September 22, 2010, 06:06:26 AM »

well jeanna
if i take off the 16 leds off the battery the ma's will go down to 17-18 ma's

i have 3 other circuits that i have built but.. i got one circuit that uses both collector and emitter of a transistor to pulse the transformer..
but i think it would take awhile before people could understand it so i haven't posted it..
there is a few things i have already posted that i should have not because of confusion..
but maybe one day when i am able to get back down to my cellar i can video of some kool stuff..
i have alot of stuff to make videos of once i get better..

robbie

jeanna · « **Reply #32 on:** September 22, 2010, 06:58:33 AM »

Quote from: kooler on September 22, 2010, 06:06:26 AM

well jeanna
if i take off the 16 leds off the battery the ma's will go down to 17-18 ma's

So you are paying somewhere between 250 and 306 uA to run each led.
I think this is not addressing the question you asked about leds in series.
These appear to be in parallel.

But then, the great thing about this HF circuit is that you CAN use the leds in parallel.
In a standard DC circuit you will blow the one that has only a little less internal resistance.
I am sure we all have seen this with cheap chinese flashlights.
They are sooo bright for a few days, then one led goes bad, then the whole light goes dim.
That sort of thing has not happened to any of my jtc's with lots of parallel leds.

[I probably said this already 4 posts ago, but... oh well.

]

thank you,

jeanna

I added a 220uH inductor to the output secondary of a small jtc today. The volts went up from 10-11v to 13v.
Soon, I will add it to the battery spot.

kooler · « **Reply #33 on:** September 25, 2010, 07:54:07 AM »

Quote from: jeanna on September 22, 2010, 06:58:33 AM

I think this is not addressing the question you asked about leds in series.
These appear to be in parallel.
But then, the great thing about this HF circuit is that you CAN use the leds in parallel.
In a standard DC circuit you will blow the one that has only a little less internal resistance.
I am sure we all have seen this with cheap chinese flashlights.
They are sooo bright for a few days, then one led goes bad, then the whole light goes dim.
That sort of thing has not happened to any of my jtc's with lots of parallel leds.
I added a 220uH inductor to the output secondary of a small jtc today. The volts went up from 10-11v to 13v.
Soon, I will add it to the battery spot.

yea i bought some china led flashlites for work months ago and they would run thru batterys so i thought i would check the draw and it was over 100ma's..
where you get your your 220uh inductors..
i don't remember asking about leds in series..
i put a trigger coil across my secondarys once and it pushed it up by 12 volts..(the primany side of the coil)
i was looking thru my notes yesterday and noticed i have a circuit built close to this one..
but i will name it something weird and post it somewere else.. it doesn't have a resistor.. unlike this one.. (bwjt)

well have a good nite..
out,
robbie

kooler · « **Reply #34 on:** February 02, 2011, 05:43:13 AM »

i was playing with a flyback so i tried this circuit on it ..
only to find that it lit a neon dim at 1.1 volts and 0.16 ma's..
hmmmmmm.. what else can i use this for..

http://www.youtube.com/watch?v=wav6mvzUdZs

robbie

kooler · « **Reply #35 on:** February 19, 2011, 05:44:11 AM »

blah,blah,blah.. .. .. .. .. ..

http://www.youtube.com/watch?v=4Nj_azGazLw

kooler · « **Reply #36 on:** February 20, 2011, 03:20:53 AM »

i might have the led backwards .. i cant remember

stprue · « **Reply #37 on:** February 20, 2011, 02:58:56 PM »

Quote from: kooler on February 19, 2011, 05:44:11 AM

blah,blah,blah.. .. .. .. .. ..

http://www.youtube.com/watch?v=4Nj_azGazLw

Nice job Kooler,

My version was right around the same input and draw but your led is blinking much brighter. Keep it up!

kooler · « **Reply #38 on:** February 28, 2011, 02:48:43 AM »

oops.. it looks like i modded the hartley circuit and renamed it .. sorry guys..

SkyWatcher123 · « **Reply #39 on:** March 01, 2011, 04:46:53 AM »

hi kooler, you thief, lol, jk.

Still is an interesting circuit. What you posted, does that transmit to the other hartley circuit and the speaker makes a tone sound i assume.
I hope this doesn't mean your giving up on messing with this type of circuit, never know what other things it could reveal.
peace love light
Tyson

kooler · « **Reply #40 on:** March 02, 2011, 04:20:35 AM »

nah.. i will still be using it in my circuits.. but i will call it what it really is.. since i was able to find it..
what you see in the picture from the radioshack book is two different version of the circuit..
they said that these two were the very basic version of the hartley circuit..
so i reckon i am a backwards joule thief.. lol

i got two other circuits i made along time ago.. so i been looking to see if someone else already has a name for them before i release them.. haha.. cause looking like a thief for the second or third time will look like a habit..

lol

i bought some very low drop out voltage regulators (0.4 volt ) so i will probably try jonny davro circuit next..

but if you have any questions on this circuit i will answer to my fullest knowledge.. which isn't much but might help..

robbie

Feynman · « **Reply #41 on:** March 02, 2011, 07:54:44 PM »

Great work guys!

I would have never been able to get I2C bus communication with my microcontroller oscillators , or my PWM robotics circuits working if I hadn't played with Joule Thiefs.

So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right?

the_big_m_in_ok · « **Reply #42 on:** March 04, 2011, 12:18:56 AM »

Quote from: Feynman on March 02, 2011, 07:54:44 PM

So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right?

He's right. They've been around for a long time. I lost mine when I moved and they may be out of print? They don't print them like that any more, AFAIK.

--Lee

kooler · « **Reply #43 on:** March 04, 2011, 05:34:21 AM »

well now i just read in a different book that any circuit that runs from 30 khz and up - - -
is a hartley osc.. if it has a dual coil and one transistor.. (aircoil)
so i don't know any more..

but yes that is a radio shack guide.. that i downloaded from somewere..
it sux that radioshack don't still run there biz the same way they did back in the 80's-90's but i reckon times change .. for the worse or good..
i am still trying to find the perfect oscillator for my device.. before i release it to public..
hoping soon..
and for whom ever is trying to get in to me i not using a firewall its a self wrote p2p program..
try python and you might figure it out.. (u know who u r .. hint u.k )

if i can help .. let me know..

robbie

Feynman · « **Reply #44 on:** March 04, 2011, 06:24:14 AM »

Preliminary measurements may indicate Joule Thief has COP>1. (COP = 1.08 to 1.4 somewhere). Results pending community assessment and further confirmation.

http://www.overunityresearch.com/index.php?topic=717.msg11577#msg11577

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