Peter L. Peres wrote :

> Dig a little in phone accessories and such. Several minidisc 
> players and at least a phone (mine) use 5V wall warts.

Yes, but I would not like to specify a particular (and maybe
a bit "odd") wall wart. The customer should be able to pick
just about anyone.

> 
> > Have anyone seen a simple switcher curcuit capable of
> > supplying 5V from the usual 9-12 V (DC) wall warts ?
> > Let's say from 500 mA up to 1A.
> 
> LM25xx simple switcher.

Yes, National has a lot of different types. But Texas has a better
sample service. :-)

> > Microchip has something called the TC105.
> 
> The LM is well established. If you want to use a mchip part, 
> do it, the efficiency is higher (the LM does 85% real (measured)
> with a good shottky diode and low Rdc coil).

I think I have skipped the MC parts, they more or less all
have a bad max in voltage, most only 6V, a few 10V...

Jan-Erik.
_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist