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Registered Member #627
Joined: Thu Apr 05 2007, 04:05PM
Location: London
Posts: 32
Hello all. I want to make a flyback driver and the transformer in a box, so 12v in and hv out. I would like to know if this flyback is suitable, and if so, what do the connections do? It has 6 connectors on it, and a big red diode next to it on the board. If I remove it, how do I wire it to the driver, and also, what two would I use for the HV?
It is from an old small B+W TV that was in the loft. Here are the pics.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
The flyback itself should work just fine, and that at black wire coming out is the HV pin.
However, using it on the board it is on now might be hard (just try to power the board up like you would if the tv still worked, and hope for the best).
If that doesn't work you will have to make your own driver, which isn't all that hard. I even have kits available at the bottom of my sale/thread thread
Registered Member #514
Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295
You can (and probably want to) wind your own primary winding on the exposed part of the core. Around 5-15 turns would probably be good for 12V input, depending on the amount of power you want to push through it.
Then you just wire up the driver and see which pin the HV output wire arcs to.
Registered Member #627
Joined: Thu Apr 05 2007, 04:05PM
Location: London
Posts: 32
Thanks for the replies. So I can leave the original primary and feedback windings, and wind my own on the opposite side of the square core? Ill look into it!
The core does have a join in it with a metal clip will this affect my windings?
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
You do not need to worry about the clamp on the core, just wind over it.
If you are using your own driver, then just leave the other windings in place. If you have trouble with arking between them you can cut them off, and then put some silicone/wax/anything besides hot glue over them.
Registered Member #63
Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
Actually, I would recommend making your windings inside the clip, then putting it back on -- everything will hold together just fine.
As for how to remove it from the board -- unless you're really handy with a soldering iron and a solder sucker, because this is an old phenolic circuit board (as opposed to fibreglass/epoxy), you can use some sidecutters to fracture the board around the flyback without damaging the blades.
If you clip between each pin, you can desolder, remove one chip of board, desolder, remove another, etc, until you're left with just the flyback
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Id say just desolder it, they aren't too hard to do, if all else fails just beat it off the board, besides its not like you'll be using the board again after the flybacks offs
Registered Member #79
Joined: Thu Feb 09 2006, 11:35AM
Location: Arkansas
Posts: 673
Or, get a light torch, heat up the solder and *carefully* bang it solder side down on the table. Once you get the hang of it, flybacks will usually just lift out, provided they're not glued/screwed in. All the other methods work fine too, just don't break the ferrite.
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Is this flyback suitable?
