Electronics Design AUSensors
Temperature Sensors
Temperature sensor selection and interfacing: NTC thermistors, PT100/RTD, thermocouple, and digital temperature sensor ICs.
Questions
How Do You Use the MAX31865 RTD-to-Digital Converter with a PT100 Sensor?
Learn how to wire a PT100 RTD to the MAX31865, configure its SPI registers for 2-, 3-, or 4-wire connections, and convert the ADC reading to temperature.
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How Do You Interface a Digital Temperature Sensor?
Covers DS18B20 (1-Wire, parasite power, multiple devices) and MCP9808 (I2C, alert pin) interfacing — circuit requirements and MCU firmware notes.
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How Do PT100 and RTD Temperature Sensors Work?
Covers PT100/PT1000 RTD sensors: 2-wire, 3-wire, and 4-wire connections, excitation current, Wheatstone bridge conditioning, and when to choose an RTD.
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What Is a Thermistor and How Do You Use One?
Covers NTC thermistor voltage divider circuits, Steinhart-Hart equation, self-heating error, ADC interface, and selection for temperature measurement.
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