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LAN_403

Platinum

Mon Nov 21 2011, 04:36PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

Newton Brawn wrote ...

Hi Platinum !

How many turns the feedback coil has ?

How many turns the primary coil has ??

Can you take the secondary coil out and run the circuit only with the ferrite, primary and feedback coil ?

Can you take some pictures what you have built ??

What kind of power supply do you have "?

Regards

Newton

Feedback has 4 primary has 7

Btw I don't have a working camera anymore. But I have a webcam.

What do you mean with only the ferrite? remove the flyback secondary.

I have a 12V 32A PS3 PSU.

Thanks for the help.

I'm going to use the flyback that came with the TV, but I must say it is clone of the one I'm using now, same stickers, same manufacturers, and the same lines of serial numbers (first 6 number are the same and last 5 and different) , and exact same look.

Newton Brawn

Sat Nov 26 2011, 05:38AM

Registered Member #3343 Joined: Thu Oct 21 2010, 04:06PM
Location: Toronto
Posts: 311

You wrote:
" What do you mean with only the ferrite? remove the flyback secondary."

Yes, remove the secondary coilfrom the ferrite. The secondary coil may have a internal short circuit preventing the oscilations.
In order to verify the circuit without the secondary, wind a additiona coil to the ferrite. This coil may have 6 turns and to is be connected to a 12V small bulb. If the oscillator is ok the bulb will glow.

Regards

Newton

Platinum

Sat Nov 26 2011, 06:55PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

Thanks for the suggestion but it did not work, I appreciate your help.

I went down to maplins today and wired up a 2n3055 and it worked! but that was pretty disappoint compared to my PC PSU flyback which I had 3 flybacks in series which was outputting about 65KV.

So I bought a 200W halogen transformer (check my thread on these drivers) and I was wondering is there anyway I can increase output of the halogen transformer?

Thomas W

Sat Nov 26 2011, 07:24PM

Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276

mabye use the HF from the Halagon transformer to power a IGBT full-bridge?

Platinum

Sun Nov 27 2011, 04:01PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

How much are IGBT's and what one to buy?

Platinum

Sun Nov 27 2011, 06:40PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

WTH!

I have a low power CFL ballast 15W running a flyback just from it, normally it arcs just 3mm, I put a small cpacitor 500v in series with one of the CFL's outputs and it now arcs about 10mm, please tell me why?

Just soldered 3 together and now the flyback arc is longer and is white, not purple, indicating higher current, please tell me why it's doing this.

Thomas W

Sun Nov 27 2011, 10:10PM

Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276

heh nice i can only think it is resonence, keep adding and removing them til you get the perfect arc :P

Platinum

Sun Nov 27 2011, 10:37PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

I've add three and the arc is white-ish so there is more current all I need now is some nice HV caps for a tesla coil, 15W tesla coil lol, still works.

I just added another capacitor, output was 3mm with none caps (3~KV) now after 4 capacitors in series output is 44mm (44KV?~) I'm stunned please can someone explain how this is working, there is more current and voltage.

The CFL has finally internally arced over as the flyback voltage was going back in to the CFL, I couldn't stop it I added one more cap to the cap bank and the flyback was arcing 48mm's, incredible still don't know how.

Ash Small

Mon Nov 28 2011, 05:29PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

It looks like you're onto something, Platinum. Stick with it and post your results.

My guess is that it might be 'tricking' the regulator in the CFL transformer into supplying more power, by changing the load characteristics, but this is only a guess.

Maybe it's just a resonance thing.

Platinum

Mon Nov 28 2011, 05:45PM

Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525

Ash, the I think you are right, somehow the capacitors are bypassing the load of the CFL. It says 15W max yet the transistors (13003) are together 40w, but the flyback's output was astonishing was much more than any 2n3055 (44mm arc, white) the current CFL arced over internally so when I get another one I'll post a vid with cap's and without. It even worked with another CFL.

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