Joule Thief

[jeanna]

Hi everyone,
I just found a surprise in my mailbox...
I am 200 very bright leds richer. and it only cost me 18bucks including shipping
Thank you Hazens1

The legs are a bit short. I could make a joke here, but I won't.
But these are very bright. I just popped on into a jtc on the table. I could read by just one. not bad for 9 cents.

OK. I have been reading the tesla lectures all day. no experiments to report.

@Dog812, Did you find the help you needed?

jeanna

[TheNOP]

frequency is not a substitute for amps.
frequency is use for transfering more amps in Tesla's coils since there are no core in them.
but there is also obstacles with higher frequencies and you have nailed one in your previous experiments.

while checking out previous posts to see if the forum "moving" was a succes, i noticed that those 2 last statements in one of my post might be seen as contradictory.

the obstacles i refered too are:
-the way a bjt trigger the transistor change the currents with the frequency.
this will not be true if the transistor is triggered by external mean

-the source might not be able to provide more amps.
see my post here


o.t.
posting seem to be possible but there are still a few forum's bugs to level out i think.

[hazens1]

Hi everyone,
I just found a surprise in my mailbox...
I am 200 very bright leds richer. and it only cost me 18bucks including shipping
Thank you Hazens1

The legs are a bit short. I could make a joke here, but I won't.
But these are very bright. I just popped on into a jtc on the table. I could read by just one. not bad for 9 cents.

Your welcome. My LEDs appeared to be standard length, about an inch with the neg being slightly shorter. How short are the ones you got?

[Pirate88179]

Since I have been playing with leds I have seen 2 different ways of determining polarity.  The first, and most usual, is that the positive lead is longer.  Some newer leds, especially the 10mm ones, have a flat on the plastic bulb on the negative side.  This is all I know.

Bill

[WilbyInebriated]

you can also tell by looking for the semiconductor die in the 'cup'. the cup is the cathode.