Recently, I posted a question about a flyback transformer schematic I was having.
If you didn't check the link, I was having problems with the frequency of the 555 timer as well as problems with the transformer core. The frequency issue is resolved (albeit a little clunkily - 10 100nF caps in series was a bit of a pain in the ass). However, the flyback still doesn't seem to be generating an arc.
This is the transformer core I used. It was salvaged from a cannibalized flourescent bulb driver. It seems to be the "real deal" - ferrite core, air gap etc. I have no idea what the turn ratio is though. I would assume the contacts to which I've soldered the red wires are for the primary and black the secondary. As one can see in this picture,
the (assumed) primary is rather thin (1 wire), while secondary seems to be quite a bit thicker, maybe 3 or 4 wires.
When I connect it all up and run it, it runs. Like I said before, it doesn't generate an arc. But the MOSFET heats up and there's an unmistakeable whine from the transformer, so there must be a time-varying current through it. I'm driving it with 12VDC (from a couple of batteries). I've tried using either side as the primary coil, with no luck (although the whine was of a different pitch).
Does anyone know what the issue could be?