Documents Flashcards Grammar checker. Compensates for both sensor and resistor tolerances datasheey. Reverse Characteristics Figure 4. Adjust R1 for the voltage across R3 equal to the Seebeck Coefficient times ambient temperature in degrees Kelvin. Unlike other sensors, the LM has a linear output.
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This code is also compatible with LM and LM34 — you just need to uncomment some lines in the code to use the right sensor. It must be an analog pin. Here, we create a temperatureC and a temperatureF variables to hold the temperature in Celsius and Fahrenheit, respectively. You need to initialize the serial communication so that you can display the readings on the Serial Monitor: Serial.
To read an analog value with Arduino you just need to use analogRead function and pass the pin you want to read as an argument. The analog values read from the Arduino may have a value between 0 and , in which 0 corresponds to 0V and to 5V. So, we can easily get the output voltage of the sensor in mV. So, the temperature in Celsius corresponds to the voltage read from the sensor in mV divided by 10mV. You just need to keep in mind that the LM returns the temperature in Kelvin degrees and the LM34 in Fahrenheit degrees.
Then, you can convert the values to other units if needed. Finally, print the sensors readings to the Serial Monitor both in Celsius and Fahrenheit degrees.
After that, open the Serial Monitor at a baud rate of You should get new temperature readings every second. You can cover the sensor with your finger to see the temperature values increasing.
LM135 DATASHEET PDF
Guide for LM35, LM335 and LM34 Temperature Sensors with Arduino
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