So you don't understand the previous posts here?Do I use a simple bridge circuit or do I need to use some sort of op-amp?
Why?Personally, I prefer to convert the thermistor resistance to a frequency and get a microcontroller (MCU) to read the frequency.
Because an MCU is better at counting pulses than measuring analog voltages.Why?
Seriously: I would love to see your calibrationless T-to-F solution that gives milli°C resolution and centi°C accuracy with only one external component besides the MCU and thermistor.Because an MCU is better at counting pulses than measuring analog voltages.
And calibration. How's the stability against temperature and Vdd/reference voltage changes?My solution consists of thermistor, capacitor, and MCU.
How does that accurately convert the thermistor resistance to a frequency?My solution consists of thermistor, capacitor, and MCU.
I charge the capacitor then allow the capacitor to discharge through the resistor. I do this many times and then count how many times I can do this in a certain time period.How does that accurately convert the thermistor resistance to a frequency?
And you really think that's more accurate than using the processors A/D converter to measure an analog voltage, such as from the bridge circuit?I charge the capacitor then allow the capacitor to discharge through the resistor. I do this many times and then count how many times I can do this in a certain time period.
by Duane Benson
by Jake Hertz
by Aaron Carman