- #1
rusty009
- 69
- 0
I want to design a thermistor circuit to be sampled by a microcontroller using an 8 bit ADC, with a voltage reference of 2.55V, I know the following
T (ºC) R(ohms)
25 2815
40 1200
I am going to use a potential divider then use a linear approximation to measure the temperature. I have two problems, firstly I don't know how to calculate the resistance needed for the potential divider, and secondly how do I calculate from the linear approximation, should I make a line between the two points given ? Thanks in advance !
T (ºC) R(ohms)
25 2815
40 1200
I am going to use a potential divider then use a linear approximation to measure the temperature. I have two problems, firstly I don't know how to calculate the resistance needed for the potential divider, and secondly how do I calculate from the linear approximation, should I make a line between the two points given ? Thanks in advance !