AVR-Chat

At 12:12 PM 2/1/05 -0600, Chuck Hackett wrote:
>2) Same as #1 but use a higher DC voltage (48?) to reduce the current and 
>hence
>reduce the voltage drop.  How does one get from 48vdc to 3-5 vdc without huge
>losses.  Cost is a factor here.  I realize that I could use a PWM 
>regulator but
>are there inexpensive chips for this?

Consider 24V, It's a common industrial DC bus voltage so there is a fair 
amount of support for it (also 24VAC).

For local power storage you could also consider "supercaps".  Maxwell (I 
think that's who it is) is making them in D cell packages (2V/cell or 
so).  Recharge is easy but cost and bulk might be an issue.

What about temperature?  Do you need to consider freezing?

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III