Thanks for the link below.  But what you've already shown me is amazing! =
 So far, audioTester was the best thing.  I literally installed the =
software and then unplugged my synthesizer and clipped an alligator clip =
to the pointy end of the audio cable from my pc sound card.  I stuck =
this in my circuit on the output of the IR sensor, and voil=E1. As my =
hand got closer I got more of a beautiful sine wave, pure as the driven =
snow.  No spikes, no "noise", no nothing.  (Do I need to do anything =
with the ground from the sound card? It doesn't seem to matter.)

My "noise" problem then must be a programming error, or something I'm =
doing wrong in reading the A/D.  That's what I think now, at least.=20
=20


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jinx
> Sent: Wednesday, June 09, 2004 5:21
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC:] My second project: IR LED Distance Sensor
>=20
> For your viewing pleasure Lindy, I've uploaded the Silicon
> Chip article on some soundcard s/w
>=20
> http://home.clear.net.nz/pages/joecolquitt/soundcard.html
>=20
> Had to snip all the purdee pictures (screenshots). Text a
> bit rough but quite readable
>=20
> Also uploaded to the same page a clearer version of the
> SC interface circuit
>=20
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>=20

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