On Fri, 7 Jan 2011 21:20:35 +0000
Andy Talbot <[email protected]> wrote:

> You'll need to write a Java, or whatever, script for your ISP that
> detects every email with a suitable header, and pings you for every
> one.   The pings are then detected and averaged, their rate converted
> to a voltage , passed though a (properly temperature compensated) log
> amplifier for display on a meter.
> 
> A PIC with non-linear lookup table could be used with real time
> bar-graph diisplay, and output to PC for a waterfall / spectral type
> display
> 
> 'JNT
> 
> 

Or you could count them?