Joule Thief

[Groundloop]

Bill,

Yes, the light output was much higher than expected from such a small inverter circuit. I measured the circuit
to use 0,4 Ampere from the alkaline battery. The light was on for approx. 2 hours before the battery was empty.

The inverter I made back in 2003 was made from a ferrite transformer found in TV's.
It used a lot more power but was able to lit up one 40 Watt and one 25 Watt fluorescent tubes with only
one wire going to each tube. See attached image. I have the circuit drawing somewhere and can post it if
you want.

Tomorrow I will get some more 15 Watt fluorescent tubes and try to see what happens if we put several of
them in series. Maybe we can get more light with approx. the same current usage?

(EDIT) I found the drawing. The transistors are 2N3055 on heat sink. One fluorescent tube connects to Out 1
          and the other to Out 2. No wires is needed on the other ends of the tubes. Circuit runs from 12VDC
          and uses approx. 30 to 40 Watt. It is probably possible to connect several tubes in series at each output.

Regards,
Groundloop.

[Mk1]

Could we make this a closed circuit thief by adding other wire to the toroid not connected to the circuit just wounded wire i got as must as 17 volts from one rectified wire, a second one is giving me the same.

Or for continuous running from earth battery.

[innovation_station]

 

great work GL

thanks for clearing up the the bs with will ...

guys we are all 1 in the same 


im now fully stocked to build many controllers

and i will be 

ist

[maw2432]

I would like to give all a Big Thanks for the great circuit info!    I think my students will be impressed and inspired to experiment.

I hope to be replicating this weekend - then do a show and tell in class the following week.  The students love to
see things that they thought were impossible.   (Me too!!)

BTW it is great to see all the respect for each other that is now being shown here.  It makes me want to come back and contribute.   

Bill

[slayer007]

@ Groundloop:

Hello Groundloop

Very Nice job.
In your circuit #82 resistor what value is it?

Thank You.