AVR-Chat

>
>One thing I didn't seem mentioned is that most Solid State Relays,  
>(SSR) are most often strictly and only AC output. 

True. Triac outputs that won't turn off on a DC load, without special measures.

> Also the inputs  are very specific.  if it is logic level then only the 5V DC is 
>needed and the rest of the driving circuit is not needed as it would 
>be driving an optolator inside the SSR.
>
>In other words, get the data sheet on the SSR and make sure you are 
>following it.

Always an excellent idea! :)