(ET) Re: Elec-trak Digest, Vol 3, Issue 4

[Rhett George <rtg ee duke edu>]

 - Greetings -

Happy New Year to all.

Steve A asked a good question about wall bricks which in some models 
provide a choice of output voltages.  Chris Zach responded with good
points on the current capability and on the number sold per whenever.

It should be pointed out that the wall brick is a modest transformer 
with maybe a rectifier, possibly a filter capacitor.  To do the same
thing in DC requires an electronics package for conversion as well as
some sort of regulator.  Tho the price will come down with purchases
in quantity, the DC battery maintenance device starts out as a pricy
proposition.

Happy Elec-Traking.                     Rhett