Substractor amplifier and Wheatstone Bridge for thermistor

Here is an amplifying circuit for a NTC sensor to get a better resolution & fidelity for a 5 volts microcontroller. The thermistor is shown as a potentiometer in the circuit like the real CL-80. It can be any thermistor as long as the resistances of the wheatstone bridge change too. The 12v source must be monitored to make sure that it will always provide 12v. The substractor amplifier values are for a thermistor of Rmax less or equal than 10 K Ohm. If the thermistor gives larger values change the substractor resistances to bigger ones. Visit the github for more details and a code: github.com/alexandergmzx/accurate_thermistor

published 6 years ago