AVR-Chat

I don't get it.  You have four AA batteries, so you have 5v if you run them
in series. You want 5v to run the printer.  Why do you need to convert
anything?





-----Original Message-----
From: C Sizer [mailto:aussiecol39@yahoo.com] 
Sent: July 30, 2004 8:17 AM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] DC-DC converter


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




 
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