On Apr 12, 2010, at 6:05 AM, Olin Lathrop wrote:

> You are making this too complicated and needlessly expensive.  One  
> of my
> side projects right now is experimenting ...
>
> This is work in progress.  I put the current snapshot at
> http://www.embedinc.com/temp/isol1.pdf.  The transformer is from  
> CoilCraft,
> and is meant for flyback operation for POE applications.  It costs  
> well
> under $1 in quantities.

 From where?  I can't find the "POE30..." from your snapshot at any of  
the usual distributers (mouser, digikey, newark.)  The cheapest "PoE"  
transformers at mouser (from coiltronics or any other vendor) are in  
that $4 range (q 100)...

BillW

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