AVR-Chat

It happens when I try to read the voltage in a voltage
divider (two resistors) connected between VCC and GND.
 Also, I have separated VCC from a AVCC by using a LC
filter.

What clock frequency are you using?

Jose

 --- Leon Heller <leon.heller@dsl.pipex.com> escribió:

> How does it behave if you are simply reading an
> input voltage, from a pot, 
> say? I don't have any problems with that, using a
> Mega8535. The reading is 
> very stable.
> 
> Leon 

> 
> 
> ----- Original Message ----- 
> From: Jose Fuentes
> To: AVR-Chat@yahoogroups.com
> Sent: Thursday, January 13, 2005 2:13 PM
> Subject: [AVR-Chat] ADC ACCURACY AND NOISE
> 
> 
> I am trying to make a ohm-meter using Atmega16.  The
> problem is that the ADC is reading values that
> change
> all the time (at least the five less significant
> bits
> change all the time).  I think there are several
> factors that affect the precision of the ADC.  Some
> of
> these factors are hardware related, an other has to
> do
> with the firmware.  I know the lower the ADC clock
> is,
> the better precision you get.  Also, the AD
> conversion
> can be done in sleep mode.  Any suggestions?
> 



	

	
		
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