avr-gcc-list
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [avr-gcc-list] ADC requires a pause for proper operation


From: harshit suri
Subject: RE: [avr-gcc-list] ADC requires a pause for proper operation
Date: Fri, 19 Mar 2004 21:35:05 -0800 (PST)

Hi Dan
the resisitance as seen by the differential input
(positional feedback pot of the servo) of the ADC
looking into the source is 3.9K ohms to 0.4K ohms
No i dont have any decoupling capacitors at the inputs
of the ADCs
thanks
--- Dan Miner <address@hidden> wrote:
> No, you have missed the point.  What is the SOURCE 
> impedance of the things driving the ADC pins?  In 
> other words, what is the resistance value of the 
> potentiometer you have connected to the ADC pin?
> Do you have a 0.1uF decoupling cap on the ADC pin
> where the potentiometer is connected?
> 
>                       - Dan Miner
> 
> > -----Original Message-----
> > From: harshit suri 
> > Sent: Friday, March 19, 2004 8:09 PM
> > 
> > The impedance looking into the ADC pins is very
> high
> > so its more like sampling voltage with a high
> > impedance voltmeter.
> > Secondly the problem of adding a delay before the
> > acutall conversion is needed even when measuring a
> > sensor using the 5V AVCC as Vref.
> > 
> > Thankyou for ure replies
> > 
> 
> _______________________________________________
> avr-gcc-list mailing list
> address@hidden
> http://www.avr1.org/mailman/listinfo/avr-gcc-list


__________________________________
Do you Yahoo!?
Yahoo! Finance Tax Center - File online. File on time.
http://taxes.yahoo.com/filing.html

_______________________________________________
avr-gcc-list mailing list
address@hidden
http://www.avr1.org/mailman/listinfo/avr-gcc-list


reply via email to

[Prev in Thread] Current Thread [Next in Thread]