AVR-Chat

Hi Jim,

Yes, by power cycling I meant to put it into a lower power mode.  I am
also going to periodically go back to full speed to see if there is a
signal from the IR reciever module.  If there is then it's back to
full power.

I'm not sure I understand your comment about the need for bypass caps.
 The circuit will only be pulling 2 lines low for approximately 150 ms
and then back to the supply voltage.  The unit we plug into is also
battery powered (5V) so the inputs will have to handle that.

Thanks,

Richard

--- In AVR-Chat@yahoogroups.com, "Jim Wagner" <jim_d_wagner@...> wrote:
>
> Opinion without direct experience: you probably don't need
> an additional regulator. You will need some good bypass
> caps, size and value depending on the nature of the loads
> driven by the micro. This is because the output resistance
> of small batteries like this tends to be higher than you
> might expect.
> 
> I assume that when you say "power cycling", you mean
> periodically putting the micro into a low power mode? Or,
> are you physically removing power?
> 
> Jim
> 
> 
> On Thu, 30 Nov 2006 00:27:25 -0000
>  "Richard Cooke" <rcooke@...> wrote:
> > Hi Folks,
> > 
> > I'm working on a battery powered consumer product that
> > will use a 3V
> > button cell.  I think we've settled on the CR2032 which
> > has a capacity
> > of 225uAH.  Our circuit will use an ATtiny13 @ 1MHz along
> > with a few
> > other items.  The total current consumption is about
> > 2.65ma when
> > always ON.  I think I can reduce that to about 460uA by
> > cycling the power.
> > 
> > My question to the group - can I just use the battery or
> > do you think
> > I'll need some type of regulator?  
> > 
> > The application will be mostly in the off state.  I'm
> > planning to have
> > the unit ON after being plugged into the  item to be
> > controlled and
> > then after 10 minutes go into the low power mode and then
> > after 30
> > minutes turn itself off.
> > 
> > Thanks,
> > 
> > Richard Cooke
> > 
> 
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