AVR-Chat

I'm a newbie at playing with HW.. I've been a software guy forever. Sorry for leaving out details.

I've got a couple of different situations. 

1) I want to have a remote AVR with an LCD that shows system status. Nothing major, but with any of say 20 inputs( think automobile, door open, oil pressure low, ignition on, etc). The LCD needs to be updated with things change.  The AVR/LCD unit will be ~10 feet from the main controller.

2) Think home alarm/automation system. Temp sensors, door sensors, smoke alarms, motion detectors, etc. These "sensors" will be up to ~100 feet away

In neither case do I need much speed. I don't have any hard number here, but I'd thinking tens of bits/second is all I need.

p.s. What is LIN??

 - jim

On Wed, 24 Nov 2004 14:40:04 -0000
"Graham Davies" <YahooGroups@ecrostech.com> wrote:

> 
> --- In AVR-Chat@yahoogroups.com, James Washer <washer@t...> wrote:
> 
> > ... working on a system ...
> > ... a few "remote" devices
> > (ADC, Temp sensors, etc)...
> 
> People would be able to help you more if you gave us some idea of the
> data rate you envision.  SPI can be pretty fast - do you need that?
> The suggestion to use CAN probably assumes you do. Cheaper and easier
> alternatives exist if a lower data rate would do.  An example would
> be LIN.  Anyway, as people say, SPI is not right for your application.
> 
> Graham.
> 
> 
> 
> 
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