RE: audio oscillator (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 29 Jun 2007 00:20:10 +0000
From: William Noble <william_b_noble@xxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: audio oscillator (fwd)


go to the national semiconductor application notes site and look up a 555
- you can't get much simpler.  If you need pure sine wave, put two op amps
in series, configured as integrators, and just adjust the gain to change
freq.  a single dual op amp chip, two caps a resistor and a pot will do
the trick


> Date: Thu, 28 Jun 2007 16:00:56 -0600> From: tesla@xxxxxxxxxx> To:
> tesla@xxxxxxxxxx> Subject: Re: audio oscillator (fwd)> > > ----------
> Forwarded message ----------> Date: Thu, 28 Jun 2007 15:44:47 -0500>
> From: resonance <resonance@xxxxxxxxxxxx>> To: Tesla list
> <tesla@xxxxxxxxxx>> Subject: Re: audio oscillator (fwd)> > > > > It's
> for a small application, so unfortunately, unable to use a computer.>
> > Resonance Research Corp.> www.resonanceresearch.com> > > -----
> Original Message ----- > From: "Tesla list" <tesla@xxxxxxxxxx>> To:
> <tesla@xxxxxxxxxx>> Sent: Wednesday, June 27, 2007 7:17 AM> Subject:
> Re: audio oscillator (fwd)> > > >> > ---------- Forwarded message
> ----------> > Date: Wed, 27 Jun 2007 03:28:01 -0700 (PDT)> > From:
> Yurtle Turtle <yurtle_t@xxxxxxxxx>> > To: Tesla list
> <tesla@xxxxxxxxxx>> > Subject: Re: audio oscillator (fwd)> >> > I know
> you asked for a reply offlist, but I figured> > someone might find
> this useful, and it's FREE:> >> >
> http://www.download3000.com/download_2259.html> >> > SigJenny turns
> your PC into a flexible and powerful> > signal generator for free! It
> can create numerous> > waveshapes; sine, triangular, square, noise,
> etc, and> > display them graphically. The square and triangular> >
> signals can have their mark/space ratio continuously> > altered to
> make sawtooth and pulse waveforms and all> > signals can be inverted.
> The output can be a single> > frequency or swept, or a single or
> repeating tone> > burst. The response to a single burst acquired from
> a> > microphone can also be displayed. With most sound> > boards the
> range is 10Hz-20kHz but with a 96kHz> > sampling sound board 40kHz can
> be achieved and the> > output can be calibrated in volts.> >> > Adam>
> >> > --- Tesla list <tesla@xxxxxxxxxx> wrote:> >> >> Anyone on the
> list happen to have a simple circuit> >> for an audio> >> oscillator.
> I need approx freq range of 50 Hz thru> >> 4 kHz.> >>> >> Please
> advise off-list.> >>> >> Dr. Resonance> >>> >>> >>> >>> >> >> >> >> >
> ____________________________________________________________________________________>
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