< From: Peter Homann >
<Snip>
> Have a look at these 2 articles. They give a very good intro discription
> of analog and digital PIDs.
>
> http://www.mcjournal.com/main/back/tutorial.htm
>
> http://www.mcjournal.com/main/tutser2.htm

Alas, these are password protected URLs.
Without the password they're not accessable.

Cheers,

Win Wiencke
Image Logic Corporation