Arduino : Using "LM-35" a Termo Sensor Module

What Will I Learn?

• You will learn to use Sensor Termo (LM 35) Sensor
• You will learn how to integrate the Termo sensor with the arduino uno board.
• You will learn how to make simple termometer with termo (LM 35) sensor

Requirements

Hardware

• Arduino Uno

• LM-35 Module

• Liquid Crystal LCD ( 16 x 2 )

• Breadboard

• Jumper Wires Male To Male

• USB type A to B cable

• Personal Computer (Laptop)

Software

• Arduino IDE

Knowledge

• Electronics and Robotics Basic

Difficulty

• Basic

Project Introduction

• This project uses a temperatur sensor (LM-35) Module that is controlled by an arduino uno board. The LM-35 Module connect to analog pin as reader input termperatur and LCD connected to arduino uno board serves as Output viewer media.

Component Description

Arduino Uno - is a Atmega32-based microcontroller board. Having many digital and analog pins, the arduino can be easily programmed via a computer or laptop with USB and is designed to facilitate electronic users in various fields. As open source he comes with 2 products namely Hardware Arduino Board and Arduino IDE software.

LM-35 Module - LM35 is a sensor that can be used to measure temperature with output that is proportional to temperature (° C). Often used because it is more accurate than thermistor and easily combined with arduino board. The low price is also a major factor in the use of this tool. LM-35 has 3 pins "V (+)", "GND (-)" and signal (S).

Tutorial Contents

Step 1 : Prepare All Parts

You can buy from online store or directly to the Electronics Shop

Step 2 : Build Circuit Architecture

• Connect the "GND" of the arduino uno board to "VSS" LCD and "V(+)" LM-35.
• Connect the "5V" of the arduino uno board to "VDD" LCD and "GND(-)" LM-35 .

Pin Connect LCD

• Connect the "pin number 7" of the arduino uno board to "RS" LCD.
• Connect the "pin number 6" of the arduino uno board to "E" LCD.
• Connect the "pin number 5" of the arduino uno board to "DB(4)" LCD.
• Connect the "pin number 4" of the arduino uno board to "DB(5)" LCD.
• Connect the "pin number 3" of the arduino uno board to "DB(6)" LCD.
• Connect the "pin number 2" of the arduino uno board to "DB(7)" LCD.

Pin Connect LM-53

• Connect the "Analog Number 0" of the arduino uno board to "Singnal" LM-35.

Step 3 : Programing

• Connect Arduino to the computer with USB .
• Open the Arduino IDE > Chose your Board Type
  

Copy the code below and paste it into your own sketch in the arduino software.

• Simple thermometer

#include <LiquidCrystal.h> // include library for LCD

LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // pin to LCD
int potPin = 0; // select the input pin for the LM35
float suhu = 0;
long val = 0;

void setup()
{
Serial.begin(9600); 
lcd.begin(16, 2); // set up the LCD's number of rows and columns
}

void loop()
{
val = analogRead(potPin); // read the value from the sensor
suhu = (5.0 * val * 100.0)/1024.0; // convert to Celcius
lcd.clear(); // clear LCD screen
lcd.setCursor(0,0); // set text to LCD row 1
lcd.print("current temp. "); // some text to add meaning to the numbers
lcd.setCursor(0,1); // set text to LCD row 2
lcd.print((long)suhu); // writing temperature value
lcd.print(" deg.C");
delay(1000);
}

After Copy the codes, click the "Verify button" to save and compile the sketch. This will also check for any errors in the program.

If no errors is found , now you can click "Upload button" to start installing the program into the arduino uno board.

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