Sorry People,

I forgot the tag on this post.


Steve




Hello All,

I have a project that I want to do in a pic but
want to make sure it hasn't been done before.
I really hate re-inventing the wheel.

Anyway,


What the circuit will do is have a speaker connected
in a test setup and pass a range of frequencies to the
speaker testing the impedance at each frequency. I would
like to have the pic connected to a computer running
a basic program for graphing the results. The results will
later be used to calculate the enclosure size for the speaker.

Questions

I know I can use a pic with an A/D for measuring a voltage
but how would you have a pic generate a frequency?

The frequencies needed are in the audio range from 1hz to about
20khz.

If it hasn't been done already I have a schematic of the manual
test setup using a freq generator and dvm to do the test manually.
I could scan and send the schematic if anyone is interested.



Any help would be great,
Steve
mailto://kcer@home.com

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