Pulstar
Newbie level 5
ptc1000
Hello
I'm building a temperature controller based on a PTC1000. The formula for the resistance of the sensor is as follows:
R(T) = (700/180*T) + 902,8
I'm trying to calculate a analog curve between 0V and 5V to correspond the temperature -20C to 120C. The Resistance@-20C is 825ohm and Resistance@120C is 1368,5ohm. I'm trying to use a 741 as an ampop for the analog readings conected to the ADC of the Pic.
Can you help me how to obtain the schematics and resistor values for the Ampop?
Thanks in advance.
Pulstar
Hello
I'm building a temperature controller based on a PTC1000. The formula for the resistance of the sensor is as follows:
R(T) = (700/180*T) + 902,8
I'm trying to calculate a analog curve between 0V and 5V to correspond the temperature -20C to 120C. The Resistance@-20C is 825ohm and Resistance@120C is 1368,5ohm. I'm trying to use a 741 as an ampop for the analog readings conected to the ADC of the Pic.
Can you help me how to obtain the schematics and resistor values for the Ampop?
Thanks in advance.
Pulstar