> You could try a http://taskled.com/fatman.html for the boost part.
> Unfortunately it won't work when the input voltage is higher than 
> the
> output, but then I'm not aware you can do that with the boostpuck 
> either.
> One other possibility is to use micropucks in parallel - according 
> to the
> info it's possible to do this with these in buck-boost mode, which 
> is what
> you need http://www.leddynamics.com/LuxDrive/micropuck.php


Bob Blick will offer you his boost buck SEPIC circuit, and may even 
make helpful comments as well as long as you remember not to mention 
global warming (or climate change). Failing that looking through the 
archives will turn up his circuit.

A page of his has just magically appeared here

        http://others.servebeer.com/misc/BobBlickSEPIC.htm

but knowing how much he loves me he'll probably complain and want it 
removed so you may need to ask Gargoyle where the original is or ask 
Bob.



            Russell





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