Difference between revisions of "Lesson 14--Microduino "A simple thermometer""

From Microduino Wiki
Jump to: navigation, search
(Created page with "{| style="width: 800px;" |- | ==Objective== This lesson will introduce the temperature sensor, combined with Microduino to be a simple thermometer. Digital temperature sensors...")
 
m (photo added)
 
(4 intermediate revisions by 2 users not shown)
Line 1: Line 1:
 +
{{Language|第十四课--Microduino_简单温度计}}
 
{| style="width: 800px;"
 
{| style="width: 800px;"
 
|-
 
|-
Line 16: Line 17:
 
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.
 
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===
 
===LM35 connection===
[[File:第十三课-LM35.jpg|600px|center|thumb]]
+
[[File:Lesson14-LM35.jpg|600px|center|thumb]]
  
 
==Experimental schematic==
 
==Experimental schematic==
 
The connection is very easy,just pay attention to the positive and negative。
 
The connection is very easy,just pay attention to the positive and negative。
[[File:第十三课-原理图.jpg|600px|center|thumb]]
+
[[File:Lesson14-schematic.jpg|600px|center|thumb]]
  
 
==Program==
 
==Program==
Line 43: Line 44:
 
==Result==
 
==Result==
 
After download, you can see the temperature data from serial monitor, refreshed every 1s.
 
After download, you can see the temperature data from serial monitor, refreshed every 1s.
 +
 +
[[File:Lesson14.jpg|600px|thumbnail|center]]
 +
 
==Video==
 
==Video==
 
|}
 
|}
 +
 +
https://www.youtube.com/watch?v=Yo3pF0iPbWk

Latest revision as of 07:45, 3 July 2015

Language: English  • 中文

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

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

Lesson14-LM35.jpg

Experimental schematic

The connection is very easy,just pay attention to the positive and negative。

Lesson14-schematic.jpg

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.

Lesson14.jpg

Video

https://www.youtube.com/watch?v=Yo3pF0iPbWk