AVR-Chat

--- In AVR-Chat@yahoogroups.com, Dave VanHorn <dvanhorn@d...> wrote:
> 
> >
> >> An SSR may still have a coil, with a small relay activating a 
large
> >> triac.
> >
> >Yikes! That's an interesting concept of "Solid State Relay" :-)
> 
> The output is not mechanical contacts, and the relay provides 
isolation.
> I've seen them, you can just barely hear the "click" if they use 
reed relays.

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

Dave