Joule Ringer!

[gadgetmall]

Hello i have a thought about torroids . we have done that and been there . The torroid you will need cost 25-50 dollars from what i remember . If you search jeanna's light you will see somewhere in the middle of the joule thief thread that we all finally got a replacment for a fuji transformer . unfortunatly they are 10 times the cost of a 5 dollar disposable camer and are LARGE high permability rings somewhere arount 4 to 5 inches in diameter and are very special . other core did not work no matter how many turns of copper . Lasersaber may have other thoughts but you can ask almost anyone here who has lit Cfls with Toroids and they will all tell you the same thing and that is it is way more expensive and time consuming . Also fuji camers are 7 to 8 dollars for a pack of two anywhere .

Albert

[neptune]

@Gadgetmall . Thanks for that info.

[The Observer]

nievesoliveras,

I said...

Use an Untampered Camera Circuit to charge the Joule Ringer's Capacitor intermittently... with a 1.5 V Battery.

                                                Fuji Camera Output ----> Capacitor -----> Joule Ringer

                                        Because the basic Camera Circuit can charge a 300 uf Cap to 100 V
                                                       in about one second from a 1.5 V Battery,
                                                                   this might be a good idea.

You said,

Exactly that is what I am trying to do.

Brilliant.

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neptune,

You said,

@the Observer. Charging the cap to 100 volts will almost certainly blow your transistor .

Probably true... admittedly a great demonstration showing a plain camera circuit is something worth pondering over !
However, perhaps the camera circuit runs for like 1/8th of a second.. to charge the cap to desired voltage (say 15 Volts).

Best Regards,
                    The Observer

[conradelektro]

Starting with a SlayerExciter circuit with tower-coil, pancake-coil and a MPSA06 transistor, I tried to replicate LserSaber's idea with the bifilar coil on the basis of the transistor.

At 4 Volt and with the bifilar coil L3 on the basis of the transistor the circuit uses about 5 times less power than the basic SlayerExciter (about 10 mA versus about 50 mA), but the little 220V-FL-tube is also a bit dimmer.

The bifilar coil L3 has too little windings (only 20 turns). I will wind a better one (similar to LaserSaber's coils) for further tests. And it is a bit of problem how to terminate the bifilar coil L3. I finally used a 1 M resistor and a 33 pF capacitor. Touching the two ends works best.

This experiment shows, that one can reproduce the effect with air coils too (instead of using a little transformer). It needs further work, specially measurements with a scope, to find out what is happening.

What I have seen so far, the bifilar coil on the basis of the transistor reduces the oscillation frequency of the circuit dramatically.

Conrad

[nievesoliveras]

@conradelektro

There is also another sec exciter that uses just a small camera trigger transformer and a couple of aluminum trays and works very well at lighting cfls wireless.

Maybe a combination of the three configurations would be a good thing.

Jesus