How does a potential divider work with a thermistor?
A thermistor usually provides a dc voltage output, which is conditioned and fed to an analogue to digital converter (ADC) chip. This converts the dc voltage value to a binary number, which a microcontroller can understand. Here is a circuit of a potential divider with an NTC thermistor.
What does a voltage divider circuit calculator do?
Voltage Divider Circuit Calculator – For NTC Thermistor. A thermistor is an electronic temperature-sensing device, which exhibits a change in resistance with a relative change in temperature. The name derives from two other words, “thermal resistor”.
What is the resistance of the thermistor at 25 °C?
The thermistor has a rating of 10 kΩ at 25 °C. When the temperature changes to 100 °C its resistance drops to 674 Ω. The voltage output therefore changes when the temperature changes and is given by the standard voltage divider formula shown.
How does the voltage of a voltage divider change with temperature?
The voltage output therefore changes when the temperature changes and is given by the standard voltage divider formula shown. Example 1: In the circuit above, if R2 = 1000 Ω, and Vs = 10 V, then the output voltage from the voltage divider will be 0.91 V when the temperature is 25 °C.
How to monitor NTC thermistor with single-ended ADC?
Monitoring NTC thermistor circuit with single-ended ADC Specifications Specification Calculated Simulated Temperature range 50ºC to 150ºC 50ºC to 150ºC ADC input range Within full scale range (< 3.3V) 785mV to 2.51V Design Notes 1. Create resistor divider topology with NTC thermistor as the top component of the voltage divider. Using
When does the resistance of the thermistor change?
Generally, you measure the voltage output across the fixed resistor R2. The thermistor has a rating of 10 kΩ at 25 °C. When the temperature changes to 100 °C its resistance drops to 674 Ω. The voltage output therefore changes when the temperature changes and is given by the standard voltage divider formula shown.