ThePicMan wrote...

>...Now I'd like to make a device for my own
>use and usefulness. It's a "poor man's very low frequency scope",
>because I need to monitor an analog low voltage (from 0.0V to 1.5V)
>input that changes slowly, and record and log this waveform on my
>PC via RS232, where I'll write a small software to do the rest of
>the job (display the waveform, save, print, etc..).

I did something like that a few years ago, using a PIC18F242 and
an LTC2400 24-bit A/D converter.  The schematic diagram and MPASM
source files are at:

http://mywebpages.comcast.net/dilatush/picdaq.zip

Maybe there'll be something useful in there.

Dave D.

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