Hi,
I'm trying to make a thermometer using a thermistor in a Wheatstone bridge going to an LM741.
However, whilst I'm getting an output of roughly 1.5v from the op amp, it doesn't change with temperature or the variable resistor changing.
The fixed resistors are 330k and the variable goes up to 100k and is in series with a 220k. The thermistor is 330k at 25°c and has a beta value of 4840k.
Any help would be appreciated.
I'm trying to make a thermometer using a thermistor in a Wheatstone bridge going to an LM741.
However, whilst I'm getting an output of roughly 1.5v from the op amp, it doesn't change with temperature or the variable resistor changing.
The fixed resistors are 330k and the variable goes up to 100k and is in series with a 220k. The thermistor is 330k at 25°c and has a beta value of 4840k.
Any help would be appreciated.