BWJT

[jeanna]

Well robbie,

I guess you got the brightness with 27mA.

Excellent!

jeanna

[kooler]

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]

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]

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]

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