AVR-Chat

You need to construct a voltage divider with the thermistor
and a second fixed resistor. It is connected with the fixed
resistor between ADC input and AVref and the variable
resistor between ADC input and ground (usually). If you
used AVcc for Vref, then connect the fixed resistor to Vcc.


Jim




On Thu, 19 Apr 2007 20:03:43 -0000
 "jasonparkerhendrix" <hendrix.jason@gmail.com> wrote:
> Does anyone know where I might find some example Winavr
> code for 
> reading the temperature from an NTC Thermistor Probe 
>
(http://www.epcos.com/inf/50/db/ntc_06/ProbeAss__B57020__M2020.pdf)
> 
> connected to one of the adc pins of an avr (atmega32)?
> 
> I would also like to know how the 2 wire probe should be
> connected.  
> Should one wire go to ground and the other to an adc pin?
>  Or should 
> one go to ground and the other go to an adc pin with
> voltage connected 
> in line via a resistor? etc...
> 
> Thanks!
> 

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