What about an LM231? Voltage to frequency converter.
You could then measure DC levels on the computer
Hmm, that'd be a bit strange: trying to measure a
changing voltage by correlating the frequency... Waay
too math to convert back to something that looks like
"normal" signal. But sounds like a good senior design
project for those guys who come on here once in a
while looking for one: take a signal with a DC
component and some known BW of AC signal (think TTL
1kHz square wave), and measure that DC and AC
component on a soundcard (ie, recover on the PC the
high/low level and some portion of the edges too,
inspite of the AC coupling of the soundcard).
Shawn
Shawn Upton, KB1CKT
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