dreed75
Newbie level 4
I am in need of something like a voltage divider. Maybe something like this exists as an IC or something but here is my problem.
I have a adc hooked up to a thermistor and the voltage on the thermistor is in the range 2400-2700 ohms. I want it to use the maximum range of 5V from the lowest thermistor value and the highest thermistor value. 2400 ohms=5V and 2700 ohms=0V. The best I could do was use another resistor (2550 ohms) and use it and the thermistor as a voltage divider and the values I got were 2.5757-2.4285 which is a difference of .1471 for the whole range. I have a 12-bit ADC which means it is one increment for every .00122 V (5 / 4095). So for the whole range of 2400-2700, the ADC will only change 120 increments. I just want to have a better resolution.
Is there something I can make that will use the entire range of 0V-5V instead of 2.42V-2.57V?
I have a adc hooked up to a thermistor and the voltage on the thermistor is in the range 2400-2700 ohms. I want it to use the maximum range of 5V from the lowest thermistor value and the highest thermistor value. 2400 ohms=5V and 2700 ohms=0V. The best I could do was use another resistor (2550 ohms) and use it and the thermistor as a voltage divider and the values I got were 2.5757-2.4285 which is a difference of .1471 for the whole range. I have a 12-bit ADC which means it is one increment for every .00122 V (5 / 4095). So for the whole range of 2400-2700, the ADC will only change 120 increments. I just want to have a better resolution.
Is there something I can make that will use the entire range of 0V-5V instead of 2.42V-2.57V?