Aha, V is your logic level voltage, theoretical 5,00 practically something around it.
A voltage divider in our case with resistors, are 2 resistors in series between V and Gnd. In our case thermistor is at the ground side.
Typically a resistor that is tied to V+ is referred to as pullup and one tied to gnd is referred to as pulldown. Although thats usual when the line doesnt have other reistors so it "pulls" the line to either logic value high or logic low, that is to V+ or gnd. So i used the term bit out of context.
The voltage that matters is the one in between them, which is proportional to R_lower_ resistor / R_total which then doesnt have units and it needs to * V to get actual voltage.
If V is logic voltage and Rupper is = 4700 ohms, and Rt is the current value of thermistor resistance then current voltage is V * Rt / R_total or otherwise V * Rt / (Rt+Rupper) = V * Rt / (Rt+4700).
A voltage divider in our case with resistors, are 2 resistors in series between V and Gnd. In our case thermistor is at the ground side.
Typically a resistor that is tied to V+ is referred to as pullup and one tied to gnd is referred to as pulldown. Although thats usual when the line doesnt have other reistors so it "pulls" the line to either logic value high or logic low, that is to V+ or gnd. So i used the term bit out of context.
The voltage that matters is the one in between them, which is proportional to R_lower_ resistor / R_total which then doesnt have units and it needs to * V to get actual voltage.
If V is logic voltage and Rupper is = 4700 ohms, and Rt is the current value of thermistor resistance then current voltage is V * Rt / R_total or otherwise V * Rt / (Rt+Rupper) = V * Rt / (Rt+4700).