jeanna's Lidmotor's Jeanna's Light

This is a very simple joule thief circuit that has a single secondary of over 300 turns. This powerful circuit can easily light a CFL. The components are these:
TIP3055, 33 ohm or 22 ohm resistor,one 25 ohm Radio Shack rheostat, one 1.2v NiMH battery, a 3.38 inch diameter ferrite toroid which is wound with 2 turns and 10 turns on the joule thief center tapped primary winding, and a 300+ turns secondary. The gutted CFL wires are connected to either end of the secondary and lights up easily. Normally a CFL requires over 450 volts to light up, and this is producing 985 volts with 70 ohms at the base resistor.
For more information see Pirate's Joule Thief Thread at Overunity, or Slayer007's Big Joule Thief thread at Energetic Forum.

Category:

Science & Technology

Tags:

• Joule Thief
• Jeanna's Light
• Joule Thief with secondary

[100roberthenry]

hi jeanna, great work, ive been trying the fuji circuit (camera hack), but i would like to wind my own 5 way coil instead (as in the tiny camera transformer) of using the tiny transformer from the camera...i'm sorry i'm new to this 'toroid' lark....is there an easy diagram, tutorial on that?..thanks .

[jeannacav]

@100roberthenry

No, not that I know of.

The camera circuits differ a lot.

Check out the very long thread called joule thief at overunity dotcom (the thread started by pirate)

The early months of that thread had lots of discussion about the camera circuits.

There are probably many people there who can help you too.

[Davetech23]

Excellent. Thank you. I tried using the core of a crt yoke, and got a little over 1kv out with 5 volts input (scoped) but it would only partially light the CFL tube. Guess the permeability isn't there.

Still digging in the junk box. Went without power for 7 months last year. Would have been nice to have had a Jenna Light!

[jeannacav]

@Davetech23

You say tube?

A cfl is the twirled bulb thing and lights up better than a tube, but is harder to start.

If you are trying a straight tube, then the light is dark at the ends. (This is the reason lid used the cfl to replicate my light.)

Also you could try putting a cap across the battery. If it is the right size it can help a lot.

Sometimes I put a small magnet at the end of the tube to start it up. It can be removed after the light is on.

thanks

[husam27]

would this toroid work ? on eBay just type (Fair-Rite Hi-Freq Ferrite Toroid 2.4'' 5961003801 61)

[jeannacav]

@husam27

I do not know. It needs to be hi permeability, not hi frequency.

I only know that many times chokes are used to choke out the hi frequency, so maybe this is a choke. I just looked it up. I think it is a choke so do not buy this.

The "robust" type transistor in essential too.

The cfl needs everything to be right!

Did you try mouser?

I think it is too bad that these toroids are not easier to find.

egads I just slipped and clicked the thumbs down! (I don't mean it whatever that is!)

[alienhddna]

i like make one for every room for my house 

[alienhddna]

look like we can start to say no to hi power bill we got 400 buck power this moth

[alienhddna]

how long can the light can run if lift on 24 hour a day