Joule Thief

[jadaro2600]

Hi.I discovered a strange modification which significantly reduces the current draw on both my Simple sec exciter and also Slayers exciter and may be worth trying on a joulethief.This is what i did.I added an extra transistor and connected the collector of the new transistor to the base of the original and the base of the new transistor to the originals emmiter and left the new transistors emitter floating.The current draw drops by over half and output is not realy effected.Whats more is you can keep adding transistors like so and the current draw comes down with each addition.If anyone has any thoughts on why this floating transistor is having this effect i would be really interested.
I have also had a think about the wireless transmision aspect of these circuits and come up with an updated simple sec reciever circuit but it works equally well with slayers exciter.
I am getting an led to light at over 2 meters distance.
I also did an experiment with slayers exciter and got it lighting an led on a vinegar battery.
Here is a vid of todays experiments and circuit diagrams of power saving mods and wireless reciever circuit update.Jonny
http://www.youtube.com/watch?v=RZWuRL4Nto8

@electricme.Hi Jim.Thanks for the hello and hope everything is good ai your neck of the woods.Jonny

Interesting.  That part of the transistors acts as a diode; try replacing this transistor with a diode ( ground bar to base ).  See if this produces the same results.  I know that you've got the base locked up on those; the diode would thus appear to be installed incorrectly.

You may even try a low voltage zener or something.  Never know, something crazy might happen.

[guruji]

@all

Koolers circuit works great!  Here are a few pic and a video is soon to follow.

1.5v
Draw .07ma
7 LEDS
Transistor 2N3904

Hi stprue today I did this circuit but it was consuming about 0.25ma not 0.07ma. How did you acquire those results that you've said in consumption? Ok I had about nine leds and they lit very dim. Is it maybe I should use 470k pot cause I used a 220k?
Anyway thanks to kooler for the circuit.

[xee2]

@ jonnydavro

I am getting an led to light at over 2 meters distance.

Great progress. Thanks for sharing your results.

[stprue]

Hi stprue today I did this circuit but it was consuming about 0.25ma not 0.07ma. How did you acquire those results that you've said in consumption? Ok I had about nine leds and they lit very dim. Is it maybe I should use 470k pot cause I used a 220k?
Anyway thanks to kooler for the circuit.

I'm using different conponents!  Not exactly like Koolers, I had to work with what I have.  Don't forget that Kooler sets his to comsume that much so he could change it if he wanted to.

@Jonny

Fantastic progress, that circuit is so cool 

[guruji]

I'm using different conponents!  Not exactly like Koolers, I had to work with what I have.  Don't forget that Kooler sets his to comsume that much so he could change it if he wanted to.

@Jonny

Fantastic progress, that circuit is so cool 

Hi Stprue thanks for response I used the 2n3904 too not as kooler maybe I should use a thinner or thicker gauge coil.
I was seeing your board photo and you put three caps with the transistor what are those?
Thanks