[time-nuts] Need help with transformer core

[Mark Sims]

Frankly,  anybody that builds up a Simple Switcher type converter from scratch 
is more than a little nuts and/or awfully lonely.  You can buy small,  
adjustable pre-built boards (buck or boost configs) off of Ebay for as little 
as a dollar each... including shipping from Old Cathay.  I usually buy them 10 
or 20 at a time.                                       
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