This is in PicBasic, but it works very well:

For K= 1 TO 32
ADCIN 0, VOLTAGE1
volt=volt+voltage1
PAUSE 1
Next
VOLT=volt/32

Regards,

Anand Dhuru


----- Original Message -----
From: "stanton54" <stanton54@EARTHLINK.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, January 22, 2003 09:14 AM
Subject: Re: [PIC]: averaging a/d input


> Hard-code a queue. Example with 4 values:
>   adc4 = adc3;
>   adc3 = adc2;
>   adc2 = adc1;
>   adc1 = read_adc();
>   adc_avg = (adc1+adc2+adc3+adc4) >> 2;
> Use a power of 2 so you can shift instead
> of dividing.
>
> Bob Japundza wrote:
> >
> > I am wondering what the best method is to average an
> > a/d input in C.
> >
> > I have an a/d tied to a fuel level sender, and am
> > trying to smooth the resultant value so that any quick
> > fluctuations in fuel level are dampened out (tilting
> > the tank, bumps, etc.)  I've thought of a push/pop
> > stack scheme to average but am afraid that would
> > consume too much memory.  I've also thought of
> > sampling the a/d once a second and taking an average
> > over ten seconds...
> >
> > Any suggestions?
> >
> > Thanks in advance,
> > Bob
> >
> > __________________________________________________
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