[sdiy] while we're talking about scaling & biasing etc

[Jason Proctor]

>If test 2a is pass, I'd rather think that it's your level shifter
>itself.  More precisely if you've done the divide-by-two thing via an
>opamp gain lower than unity I would expect it to be oscillating.

ok, so the line on the scope is solid at 5v, but gets fuzzier as the 
input tends towards 0v. as one might expect, the digital readings 
follow suit.

i'm no expert at this. what's going on?

thanks for the help,
j