AVR-Chat

Hi guys,

thanks to everyone who has responded, it has been truely helpful. 
There were a number of considerations raised I had not though of at 
all.

I will go back to the drawing board and analyse all the current 
demands of my design before making a final decision.

Cheers, and again thanks

Col

--- In AVR-Chat@yahoogroups.com, "C Sizer" <aussiecol39@y...> wrote:
> Hi guys,
> 
> I am designing a university project, a hand-held printer using the 
> AVR and a small thermal printer. For portability I want to use 4 x 
> 2300mAh AA batteries in serial/parallel to provide me with 3V.
> 
> The printer runs on 5V but consumes over 3.5A peak, so I require a 
DC-
> DC converter circuit (or at least a starting point) to provide 3V 
at 
> 5A peak.
> 
> Has anyone designed anything like this, or can give me some advice? 
> Maybe someone has an idea for a better battery for me to use?
> 
> Cheers
> Col