AVR-Chat

Hi
I want to make a tuner an I do not know how I can measure the frequncy 
of an analog signal with AVR. I will be really appriciated If somebody 
could help me.

On 4/2/07, negink63 <negink63@yahoo.com> wrote:
>
> Hi
> I want to make a tuner an I do not know how I can measure the frequncy
> of an analog signal with AVR. I will be really appriciated If somebody
> could help me.


Tune a Radio, Tune a guitar,  Tuna Piano, Tuna Fish?


[Non-text portions of this message have been removed]

You can tune a piano but you can't tuna fish.  :-)

On Mon, 2 Apr 2007, David VanHorn wrote:

> On 4/2/07, negink63 <negink63@yahoo.com> wrote:
> >
> > Hi
> > I want to make a tuner an I do not know how I can measure the frequncy
> > of an analog signal with AVR. I will be really appriciated If somebody
> > could help me.
> 
> 
> Tune a Radio, Tune a guitar,  Tuna Piano, Tuna Fish?
>

There is a guitar tuner project at avrfreaks... in general, you apply the signal to be measured to the analog comparator, count clocks between edges using input capture. 

-----Original Message-----
From: microbrix@gmail.com
To: AVR-Chat@yahoogroups.com
Sent: Mon, 2 Apr 2007 1:35 PM
Subject: Re: [AVR-Chat] Frequency meter


On 4/2/07, negink63 <negink63@yahoo.com> wrote:
>
> Hi
> I want to make a tuner an I do not know how I can measure the frequncy
> of an analog signal with AVR. I will be really appriciated If somebody
> could help me.


Tune a Radio, Tune a guitar,  Tuna Piano, Tuna Fish?


[Non-text portions of this message have been removed]



 
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[Non-text portions of this message have been removed]

--- In AVR-Chat@yahoogroups.com, "negink63" <negink63@...> wrote:
>
> Hi
> I want to make a tuner an I do not know how I can measure the frequncy 
> of an analog signal with AVR. I will be really appriciated If somebody 
> could help me.
>

you can flash an led at the frequency to which you want to tune the
string.  when the string is vibrating at the correct frequency it will
appear to be still when illuminated by the led.