In article , Day Brown wrote:
Jasen Betts wrote:
a computer with apropriate software could do that using the 16-bit ADC in the
soundcard for input, or you can buy specialised devices that come with
software too...

or a microcontroller could be combineed with a current source and sensitive
DAC to output resistance readings 100 or so times a second...
Waitaminit. I've long wondered if the soundcard could not take input
as data. Rather like the com port? where's this software? Linux?

in linux you can do

od -tx1 /dev/audio

and get a crude hexadecimal dump of the soundcards input mixer
(so to read line-in or mic you need to turn them on using aumix etc)

if you want something better google for this:

soundcard software oscilloscope linux


Bye.
Jasen