Re: [avr-chat] New Programmer, Small Program, F_CPU for Atmega644

[Joerg Wunsch]

Robert L Cochran <address@hidden> wrote:

> I was planning to use a lithium polymer battery that pumps out 12v
> at 1300 mA. I connected that to a power supply board which will give
> me 5v output and 1100 mA current.

If that's a linear regulator, it will waste a lot of energy.

If you've got a choice, a single LiIon cell delivers a voltage in the
range of (3.0 ... 4.2) V (nominal voltage 3.7 V), this is a good power
supply to drive an AVR directly from it, without any regulation.  You
just have to mind the CPU frequency limit for the given voltage, which
is 10 MHz max. for the ATmega644.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)