AVR-Chat

>
>The biggest question is: is the problem caused by HARDWARE
>or SOFTWARE? i look at my software and it seems ok. i look
>at the hardware schematics and it also looks OK. In the
>situation like what i am in now, which should i check
>first? Hardware? or Software?
>
>If i must check hardware, why does the error only happens
>occasionally (getting more often lately) and not ALWAYS?

The simple answer, is that you don't always produce the same noise.

>Sorry if i dont give you much information about my
>project. I am really upset now :(


Ok.. First, power the micro from a CLEAN 5V supply, that does not come from 
the same source as the motor power. The only thing they should share, is a 
single point of connection on the ground, so that the signals have a common 
reference.

Second, how are you switching your inductive loads?

Are the relays connected with snubbing diodes?