ESTE: Analog Temperature Sensor 1 (LM35DT - Precision Centigrade Temperature Sensors)

This experiment is part of this project.

Here we are going to build one experiment to use the ADC and to learn how to use a temperature sensor. Among many types of temperature sensors we are going to use the LM35DT, a precision integrate-circuit temperature sensor, that is directly calibrated in °Celsius (Centigrade) with an output voltage linear (10 mV/°C). So if we want to use this sensor to measure the temperature of one enviroment in °C we will just need to convert each 10mV to 1°C. If we also want to measure the temperature in °F we will need to convert the obtained temperature in °C to °F through the equation °F = (°C x 9/5) + 32°.

Pseudo code

A solution for this experiment is shown and well explained on the Sensor Reading’s script.

Schematic

Schematic to read a Temperature sensor (LM35DT)

Part List

• 1 LM35DT
• 1 Protoboard
• 3 copper wires (tinned) or jumpers

Assembly

Assembly of the Temperature sensor (LM35DT) system

Solutions

• C - AVR
• Arduino UNO

Tools

• AVR GCC and tools
• Arduino IDE

References

• Adafruit: Using a Temp Sensor
• Learning about electronics: How to Build a LM35 Temperature Sensor Circuit
• Texas Instruments Datasheet