Lesson 14--Microduino "A simple thermometer"

Objective This lesson will introduce the temperature sensor, combined with Microduino to be a simple thermometer. Digital temperature sensors have a common DS18b20, DHT11, SHT10 and so one. Analog temperature sensor has thermistor, AD590, LM35D so on. Equipment Microduino-Core Microduino-FT232R Other hardware equipment Breadboard Jumper one box Breadboard one piece LM35D temperature sensor one LM35 temperature sensor This sensor can measure of 0-100 degrees Celsius temperature, and output the value of voltage. Starting from 0 degrees temperature rise per 1 degree output voltage will increase 10 mv, so that we can use the analog port to detection sensor voltage, after simple to calculate the measured temperature value. LM35 connection 文件:Lesson14-LM35.jpg 600px Experimental schematic The connection is very easy,just pay attention to the positive and negative。 文件:Lesson14-schematic.jpg 600px Program void setup() { Serial.begin(115200); //Set teh baud rate to 115200 } void loop() { int n = analogRead(A0); //Read the voltage from A0 float vol = n * (5.0 / 1023.0*100); //Use a float variable to save temperature value which was calculated from voltage. Serial.println(vol); //Output the temperature from serial delay(1000); //Wait for 1s for refresh } Result After download, you can see the temperature data from serial monitor, refreshed every 1s. Video