[Top][All Lists]
[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