On Wed, 24 Sep 2003 09:47:58 +0100, "Geoff Hackett"
wrote:

Hi,

Some older non PC computers have A/D built into joystick ports or sound
capture ports. The Acorn BBC and Amiga computers I think. You could look at
getting an old one cheap. They can be programmed in basic for the graphics
etc.

Or just buy a used audio scope. 10Mhz 1 Channel.

Geoff


It's not just older, non PC computers, the typical "standard" joystick
port found on most if not all PCs is analog, then A/D converted.
However the range might be poor enough to make the resulting readings
too inaccurate? Here's an application to do it with the sound "card"
analog audio input instead:

http://polly.phys.msu.su/~zeld/oscill.html


Dave