AVR-Chat

----- Original Message ----- 
From: James Washer
To: AVR-Chat@yahoogroups.com
Sent: Wednesday, November 24, 2004 3:32 PM
Subject: Re: [AVR-Chat] Re: Any general length considerations for SPI 
busses?


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??


LIN (Local Interconnnect Network) is a networking system intended mainly for 
automotive applications where the speed and reliability of CAN isn't 
required. Atmel has an app note on a software implementation for the AVR.

Leon