Joule Thief

[altrez]

One thing I noticed is that the torriod doesnt seem to make that much of a difference.  My 3-5-15 works as well as my biggo with way more winds!  Lets see how long it lasts!!!

What transistor are you using? Will a 2n2222 work?

-Altrez

[altrez]

@Jonny

Your advice!

Thanks...Stew

Nice! are you getting good distance yet?

-Altrez

[altrez]

Hi Altrez.When you get a trigger coil,sometimes they will have three pins and sometimes four.Only three pins are used and if you get one with four it is just to help with mounting.
Is all you do is connect a croc lead to a metal bowl or tray and connect the end of the croc lead to one end of the primary coil of the trigger transformer.Do the same with the other end of the primary.
Get another croc lead and attach that to the third pin which is the hv output and feed that into an avramenko plug but the most important thing is to use a good virtual gound on the last leds negative leg.
The idea behind it is the simple sec is acting as a transmitter and to recieve the most energy,both transmitter and reciever have to be tuned to the same frequency and as both transmitting coils and recieving coils are the same,they should be fairly close.
Xee2 may have some ideas on how we can improove on this as  he has experience in radio but it is quite a good place to start.Jonny.

Thank you! I can get around two feet with the TDK circuit and small as in about the size of a half dollar receivers.

-Altrez

[kooler]

Kooler, that is a very long run for the circuit!!  nice job!  Could you try something for me....one of the differences I have tried is connecting the + rail of the voltage input to the + of the output/led rail!  Not sure if it make a difference but since my versoin is a little different I would like to see what is does.  (for me no inducto...yet, mica cap, switching doides on both rails and a not ideal 2N3904 transistor)

the reason i showed the video of it running at 1.5ma is because i figured some might see it if they built this but theres alot of spikes going back to the battery.. put a led on the battery and it will light.. anywhere on this circuit it will give enough power to light a led at 1.5ma..
even the resistor and the cap will light a led with no loss on the input..
thats why i asked xee2 were would the bemf be at.. because were it should be.. it isn't..
its a interesting circuit..

xee2
i put a bridge and cap on the secondarys and it would only charge up to 3.1 volts.. thats with no leds in it..
and the same volts with 4 leds in there..

robbie

[xee2]

@ altrez

The drawing of the simple SEC I posted was not correct. Corrected drawing below. I also tried to build this and it did not work for me. I hope you have better luck.