Joule Thief

[slayer007]

Very simple SEC ya got there. Good work. Its generating A of RF that could possibly be bad for your health with prolonged exposure. Have you tested with a spectrum analyzer?

And very cool results Slayer007. If you made a circle of towers they would all receive power if you keep them in the rf bubble. Oh I forgot to ask. Do you have the LEDS in series or parallel?

-Altrez

The led's are all in series.

[resonanceman]

I did my first wireless experiment 

I did not use  a SEC or  a  trigger coil.

I used 2 candy cane coils
One of them  was used  as the JT coil
The other  one had  the  output  if the first coil  across  its primary,  so it  was acting like  a step up transformer.

It  was not  all  that impressive........  I lit  a red LED to about half brightness with  the wires of my  diode "plug "
The the interesting thing to me is that nothing  extra  is needed........only stuff I have been playing  with for months.

I used  a 3 X 9 inch  piece  of copper  flashing  as a transmitter
I just  connected one leg of the  step up coils  secondary to  the copper  and  it worked

I was pretty sure  it  would  .....  I had   just  tried  lighting a 25 W CFL    it lit to near  full  brightness.   I   disconnected one leg ....... it  did not light up but  it created  a pretty good glow about  half way up  on the  connected  side

I am pretty  sure that  anyone  that  has a JT that  will light  a floro or CFL  can  transmit  a little power  with that JT

gary

[resonanceman]

Hello anyone !!!!

Please will someone answer me...

Has anyone been able to make a Joule thief powering either LED's or a very bright light bulb, 
bright enough to fully light up a room completely where the whole room is lit bright ?

please show me...

Feepow

I think  everyone  here is still  in  expermenter mode.
I don't  think  that there have been many attempts  at scaling  any of this  up.
I learned real quick  that expermenting  with higher power levels  can make smoke  real  quick,

Most  of  my circuits  are 12 V     
My normal  load  is  a 90 LED  array
It often lights  bright  enough that my  reaction is  turn is down  before it gets fried.

I am  not saying that it is  possible  to light  a room  with it ..... but a couple  of them would probably do a pretty good job

I  use  a 7.5 K ohm  resistor  on  my base so that  I do not  overheat  it ........ I have  ran it with  half that resistance........but I like my circuits to run fairly cool.

gary

[xee2]

@ resonanceman

I did my first wireless experiment 

Congratulations. How far did you transmit? What is a "candy cane coil"?

[resonanceman]

@ resonanceman

Congratulations. How far did you transmit? What is a "candy cane coil"?

Xee

The picture  is one of my early candy cane coils
It shows  why  I picked  the name
With  just  a few wraps  on each  toroid  the  winding  spiral  around the toroids  like the stripes  on  a candy cane.

The  coils I used both  had 6 toroids........ 20  wraps  of  cat 5 twisted pair on  each toroid.......all  going the same direction.

The  candy cane coil came from  my  search for  a way to make  stronger JT without  big  toroids.

My normal  primary for  the candy cane coils  is   4 wraps through  the center of all the toroids..
(The  green wire in the picture )


I normally  use  the  secondary  with  start of one wire connected to the end of the other ........just like the primarys


I was able  to  light  the  red LED to about half brightness at about a half inch... not impressive..........but I am sure  I will  do  better later.

One thing I need to do is order more toroids  for more candy canes.......or bigger  candy canes.
One or the other should  do better


gary