Joule Ringer!

[Lynxsteam]

The Lynx Joule Lamp is finicky if it isn't done right.  Since I am still experimenting I still can't say what's best.  But, this morning I wound the primary a lot more carefully on a larger diameter and amps dropped from .224 down to .093 with the same light.  But I had also reduced the turns so I am sure voltage was higher.  That was pretty neat on 6 volts to get that much light with a 1/2 watt. 
Tried it with 12 volts and fried the transistor with a flash on the bulb.  Voltage back to the base was probably exceeding the rating.
I will try to refine this setup as soon as possible so people don't get frustrated.  But here's my guess at to where it's headed.

Secondary, 8.5" long 500 turns 30 awg on 3/4" PVC (1.2" D)
Primary, 8.5" long 30 turns, solid heavy copper wire to hold shape on a 2" ID.

From there I will clip onto different turns of copper to determine best brightness on 12-14 volts without blowing the transistor.  30 turns is probably safe for 12 volts  because I know it works.  25 turns is brighter and is pushing it a little, but with the larger diameter primary it may be different.

I tried the two transistors, slightly brighter but not worth the trouble.  Better to carefully tune the circuit.

I am hoping for 12.4 volts x .200 amps = 2.48 watts to light the 40 watt equivalent bulb at half brightness (very bright).  This CFL is rated for 9 watts full brightness.

[Lynxsteam]

Here is a schematic showing where components go.  Its very important that the start and ends of coils go to the right place in the circuit.

[hartiberlin]

I repaired the thread.
The last posted picture

Lynx Joule Ringer lamp circuit diagram

was somehow to big and a bit corrupted.

Regards, Stefan.

[Lynxsteam]

By request, here is a video of "How to make the SJR2.0"  I made some mods but followed the basic idea.  You can see that you can "hotrod" the basic joule ringer with more turns, you can use a tip2N3055, use magnet wire, skip the extra primary.  The LEDs light brightly off a 9 volt, or super bright off 12 volts.  I think a 11:1 ratio is necessary to get the voltage up so that the voltage doesn't drop too much across the bulbs.  But the 10:1 ratio is very low power draw.
Running two 110 volt bulbs off a small 9 volt really demonstrates what a Joule Thief does.

http://www.youtube.com/watch?v=ROwdzpbISB4

[Lynxsteam]

Something I should have mentioned in the video linked above.  Once the "Goop" adhesive sets up the ringing stops.  In the video the adhesive had only been on for about ten minutes.  And it will separate easily if you want to disassemble later.  The amount of adhesive actually between the E-cores is less than paper thin.