Joule Thief

[electricme]

Lastly the High Voltage Secondary

Bifilar coil showing the 2 ends.
First is what it the coil looked like after the blue tape was removed
HV coil
   
Green gunk that kept breaking the wire as I was trying to unwind the coil, I ended up unwinding it piece by broken piece.

Last turn

[electricme]

Lastly,

The Kodak transformer is wound exactly as I previously thought it was as I had posted previously.

The High Voltage secondary.
I have no idea of how many turns were origanally were wound on the former, during the unwind, every time I came to the lower layers where the pinouts are, the green gunk (insulation material) had encased/enclosed over the wires and had solidified. This stuff is unbelievably hard and difficult to remove, so I simply used a sharp object (needle) to get under a strand or two and brake the wire and continue the unwind.

Eventually I reached the last layer, unfortunately only one end was available which is seen in the JPG.

However the ohmeage readings show where each coil end went to which pinout.

Hope this has shed some light on this transformer.

jim

 

[WayneJT]

@All
Could someone please help me identify this AA camera board, I have not seen this one before, it has a larger primary transformer than any of the other boards I've collected, the HV cap has a coil attached to it which is the same same diameter as the cap, and a small circuit board attached to the coil which has what I believe may be a voltage regulator, the only markings on it is S6A35
I hope the pics are clear enough.

@Electricme

Good job on the transformer dissection

Wayne

[electricme]

Wayne:

I spent a couple of days (between other things) looking for this device, there is a lack of information on the web about it, but I did manage to come up with the following.

The S6A35 is a Special Purpose Strobe Thyristor, it's a high speed device, and switches up to 400 volts in 3.5 uS (micro seconds)
It's made by Toshiba.

If it is named under a different name then I havent seen it as yet.

Hope this is what you have been looking for.


Have you any idea what brand of camera it came out of?

jim

[WayneJT]

Hi Jim

The outer casing of the camera was grey and did not have any labels or any form of identification, nor does the circuit board only stamped with 920 , so sorry but I got no idea what it is, maybe really old or something new, however I did a voltage test and got around 335vdc which is pretty much he same as the rest I have.

Managed to get 96 LEDs lit by a Kodak AA board today, a little dim after attaching the last string of Leds but for me thats quite an achievment, thanks to all the good folk on this thread.

Wayne