Hi,
An idea I had recently (though I'm sure it's not original) is to hook up 8 555-timer circuits with variable resistors to the parallel port and poll it periodically to figure out the frequency of the 8 squarewaves on individual parallel port pins. These frequencies could be used as control values in a Pd patch. The advantages are that 555 timer circuits with a variable resistor are very cheap, and simple. Your range would be from where frequency updates are too far between (let's say 100Hz) to the upper-range of the parallel port polling frequency. So if you can poll it at 8000Hz you would probably want to stop at nyquist to get meaningful updates let's say at 4000Hz (not quite certain that nyquist is relevant here though).
Regards,
Chris.
On Thu, Oct 30, 2003 at 07:22:07PM -0700, 0 wrote:
I was wondering if any of you could recommend sources for sensor fabrication. I'm interested in building my own sensors for use in performances w/ computer interface. I'd love advice about books to read, websites, or even where to start (i.e. do I need to be an electrician first). Thanks,
-i
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