On Fri, 10 Mar 2000, andy howard wrote:

> How about a display that mimics the broadcast-style PPM (Peak Programme
> Meter), i.e. with a fast response on a rising signal or transient and a
> slower decay as the signal falls. Looks nice and actually gives some
> useful information about signal peaks.
>
> Another neat looking trick (this is mainly for the look right?) is to
> have the highest lit LED on the bargraph stay on for a half-second or so
> after the signal drops - in other words on a rising signal it looks like
> a normal bargraph but on a falling signal one LED stays lit indicating
> the previous peak level.  Both of these look quite technical and
> impressive.
Great ideas! #1 is probably easier, just adjust the filter decay. #2 needs
a fast decay filter AND a slow decay filter that only affects one led. But
I like it -- thanks -- Rich