Re: Simple audio signal to level convertor?

On Tue, 1 Jul 2008 10:15:55 -0700 (PDT), Kasterborus
<kasterborus@xxxxxxxxx> wrote:

Hi,

I'm looking for a circuit that can read a standard line level audio
signal and output a continous voltage 0-5v proportional to the
amplitude of the input.

This in turn would be read by an ADC/microprocessor to modulate some
flashing lights.

As always - any help is greatly appreciated.


If you are going to use an ADC and microprocessor anyway, you might
want to consider letting them do more of the work. You could provide
a preamp to get the signal in range of the ADC, and let software do
the rest.

That way , the software can handle attack/decay time constants, and
most importantly it can do FFT spectral analysis to get frequency
information, if you later decide you want it.

Of course, this will mean that you will need to sample at a much
higher rate and deal with the flow of data. You don't mention the
capabilities of the uP you have in mind... can it handle this kind of
workload?

Best regards,


Bob Masta

DAQARTA v4.00
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
FREE Signal Generator
Science with your sound card!
.