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--- en:iot-open:practical:hardware:itt:avr:thermistor [2025/09/02 09:40] – raivo.sell
+++ en:iot-open:practical:hardware:itt:avr:thermistor [2025/09/02 09:45] (current) – raivo.sell
@@ Line 21: / Line 21: @@
-Usually, a voltage divider is used for measuring the resistance of a thermistor, where one resistor is replaced with a thermistor, and the input voltage is constant. The output voltage of the voltage-divider is measured, which changes according to the change in the resistance of the thermistor. If the voltage is applied, current goes through the thermistor, which heats up the thermistor due to the thermistor's resistance and therefore alters the resistance again. The fault caused by the heating up of the thermistor can be compensated with calculations, but it is easier to use a thermistor that has a higher resistance and therefore heats up less.
+Usually, a voltage divider is used for measuring the resistance of a thermistor, where one resistor is replaced with a thermistor, and the input voltage is constant. The output voltage of the voltage-divider is measured, which changes according to the change in the resistance of the thermistor. If the voltage is applied, current goes through the thermistor, which heats up the thermistor due to the thermistor's resistance and therefore alters the resistance again. The fault caused by the heating up of the thermistor can be compensated with calculations, but it is easier to use a thermistor that has a higher resistance and therefore heats up less. With restricted resources and with fewer demands on accuracy, previously calculated charts and tables for temperatures are used. Generally, the tables have ranges of temperatures and respective values of resistance, voltage, or analogue-digital converters. All exponential calculations are already done, and the user needs to only find the correct row and read the temperature given.
-With restricted resources and with fewer demands on accuracy, previously calculated charts and tables for temperatures are used. Generally, the tables have ranges of temperatures and respective values of resistance, voltage, or analogue-digital converters. All exponential calculations are already done, and the user needs to only find the correct row and read the temperature given.

en/iot-open/practical/hardware/itt/avr/thermistor.1756806017.txt.gz · Last modified: 2025/09/02 09:40 by raivo.sell