Ic | 14core.com

Introduction of ACS712 Current Sensor Module – 30A with Arduino

Reading Sensing and Controlling current flow is a requirements in a wide variety of application including, over-current protection circuits, switching mode, battery chargers, power supplies, digital watt meter and programmable current source, etc.. The ACS721 current reading module is based

Using PIR Motion Sensor in Arduino with Source Code

Passive Infrared Sensor ( Motion Sensor) PIR Motion Sensor is a highly integrated module used for human entry detection it can easily adopt in the system. There will be a 2 adjustable potentiometer in the module board, which is any

Starter #16 Controlling a Relay Using Arduino with Source Code

What is a Relay? A Relay is a electronic operated switch, relay’s uses an electromagnet mechanical to operate the switch and provide electrical isolation between two circuits. Is this lab project we don’t need to isolate one circuit from other,

Starter #15 Using Photo Resistor and LEDs

This sketch guide you to create a LED animation transition using LDR ( Light Dependent Resistor) with Arduino. Photo Resistor are variable resistor which change resistance depending on the light hitting the sensor. When you put your hand closer to

Installing drivers for Arduino Uno R3

It is important to follow the steps mentioned next to be able to use the Arduino Uno R3 and some other boards. Please check the Arduino website for up-to-date references. 1. Plug your board in and wait for Windows to

Installing drivers for Arduino Duemilanove, Nano, or Diecimilla

When you connect the board, Windows should initiate the driver installation process (if you haven’t used the computer with an Arduino board before). On Windows Vista, the driver should be automatically downloaded and installed. (Really, it works!) On Windows XP,

The Raspberry Pi Models and How to Address them

The Raspberry Pi Models and Version & the Difference. Lots of Makes, developers, hobbyist and engineers these days questioning what is the difference between Arduino & Raspberry. Even though both are made for solving difference problems. Raspberry Pi is a

Downloads

Drivers For UNO/MEGA/PRO using FTDI Chip on board FTDI USB Chip Driver for ( XP/WIN7/WIN8) | Zip / Exe FTDI USB Chip Driver for (Mac) 32Bit | 64Bit FTDI USB Chip Driver for (Linux) 32Bit | 64Bit Software ESP8266 /

Starter # 11 How to use 16×2 LCD Screen with Arduino with Source Code

This tutorial will show you how to use the LCD Screen 16×2 in Arduino. Electronic Parts Required ARDUINO UNO/MEGA/PRO 1x Potentiometer ( To adjust the Brightness, Contrast of the LCD) 1x LCD Screen 1602 Jumper wire

/*
    .  .          ........ .... ..   ......      ........                       
MMMM   MMMMM    MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM                       
 MMM.MMMMMMM   MMM      MMM     .MM.MMM     MMM .........      .... ... .  . .  
MMM MMMMMMM . .MM.      MM.     MMM MM.  . MMM MMMMMMMMM       MMMM MMMMM.MM MM
MMMMMMMMMMMM. .MMM      MMM.  .MMM.MMMMMMMMM  ........    MMM MM  . M .MMMMMMMM.
MMM    .MMM     MMMMMMMM.MMMMMMM.  MM    .MMM. MMMMMMMM.  MMM .MMMM MMMM MMMMMM.
www.14core.com                                             .   ...  . .  ......
*/

int LCD1602_RS=12;   
int LCD1602_RW=11;   
int LCD1602_EN=10;   
int DB[] = { 6, 7, 8, 9};
char str1[]="Welcome to";
char str2[]="www.14core.com";
char str3[]="this is the";
char str4[]="4-bit interface";

void LCD_Command_Write(int command)
{
 int i,temp;
 digitalWrite( LCD1602_RS,LOW);
 digitalWrite( LCD1602_RW,LOW);
 digitalWrite( LCD1602_EN,LOW);

 temp=command & 0xf0;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }
 
 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);

 temp=(command & 0x0f)<<4;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);
}

void LCD_Data_Write(int dat)
{
 int i=0,temp;
 digitalWrite( LCD1602_RS,HIGH);
 digitalWrite( LCD1602_RW,LOW);
 digitalWrite( LCD1602_EN,LOW);

 temp=dat & 0xf0;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);

 temp=(dat & 0x0f)<<4;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);
}

void LCD_SET_XY( int x, int y )
{
  int address;
  if (y ==0)    address = 0x80 + x;
  else          address = 0xC0 + x;
  LCD_Command_Write(address);
}

void LCD_Write_Char( int x,int y,int dat)
{
  LCD_SET_XY( x, y );
  LCD_Data_Write(dat);
}

void LCD_Write_String(int X,int Y,char *s)
{
    LCD_SET_XY( X, Y );    //set address
    while (*s)             //write the string
    {
      LCD_Data_Write(*s);   
      s ++;
    }
}

void setup (void)
{
  int i = 0;
  for (i=6; i <= 12; i++)
   {
     pinMode(i,OUTPUT);
   }
  delay(100);
  LCD_Command_Write(0x28);
  delay(50);
  LCD_Command_Write(0x06);
  delay(50);
  LCD_Command_Write(0x0c);
  delay(50);
  LCD_Command_Write(0x80);
  delay(50);
  LCD_Command_Write(0x01);
  delay(50);

}

void loop (void)
{
   LCD_Command_Write(0x01);
   delay(50);
   LCD_Write_String(3,0,str1); //Row1, column4
   delay(50);
   LCD_Write_String(1,1,str2); //Row2, column2
   delay(5000);
   LCD_Command_Write(0x01);
   delay(50);
   LCD_Write_String(0,0,str3);
   delay(50);
   LCD_Write_String(0,1,str4);
   delay(5000);
   
}

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. . ........ .... .. ...... ........

MMMM MMMMM MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM

MMM.MMMMMMM MMM MMM .MM.MMM MMM ......... .... ... . . .

MMM MMMMMMM . .MM. MM. MMM MM. . MMM MMMMMMMMM MMMM MMMMM.MM MM

MMMMMMMMMMMM. .MMM MMM. .MMM.MMMMMMMMM ........ MMM MM . M .MMMMMMMM.

MMM .MMM MMMMMMMM.MMMMMMM. MM .MMM. MMMMMMMM. MMM .MMMM MMMM MMMMMM.

www.14core.com . ... . . ......

int LCD1602_RS=12;

int LCD1602_RW=11;

int LCD1602_EN=10;

int DB[] = { 6, 7, 8, 9};

char str1[]="Welcome to";

char str2[]="www.14core.com";

char str3[]="this is the";

char str4[]="4-bit interface";

void LCD_Command_Write(int command)

{

int i,temp;

digitalWrite( LCD1602_RS,LOW);

digitalWrite( LCD1602_RW,LOW);

digitalWrite( LCD1602_EN,LOW);

temp=command & 0xf0;

for (i=DB[0]; i <= 9; i++)

{

digitalWrite(i,temp & 0x80);

temp <<= 1;

}

digitalWrite( LCD1602_EN,HIGH);

delayMicroseconds(1);

digitalWrite( LCD1602_EN,LOW);

temp=(command & 0x0f)<<4;

for (i=DB[0]; i <= 9; i++)

{

digitalWrite(i,temp & 0x80);

temp <<= 1;

}

digitalWrite( LCD1602_EN,HIGH);

delayMicroseconds(1);

digitalWrite( LCD1602_EN,LOW);

}

void LCD_Data_Write(int dat)

{

int i=0,temp;

digitalWrite( LCD1602_RS,HIGH);

digitalWrite( LCD1602_RW,LOW);

digitalWrite( LCD1602_EN,LOW);

temp=dat & 0xf0;

for (i=DB[0]; i <= 9; i++)

{

digitalWrite(i,temp & 0x80);

temp <<= 1;

}

digitalWrite( LCD1602_EN,HIGH);

delayMicroseconds(1);

digitalWrite( LCD1602_EN,LOW);

temp=(dat & 0x0f)<<4;

for (i=DB[0]; i <= 9; i++)

{

digitalWrite(i,temp & 0x80);

temp <<= 1;

}

digitalWrite( LCD1602_EN,HIGH);

delayMicroseconds(1);

digitalWrite( LCD1602_EN,LOW);

}

void LCD_SET_XY( int x, int y )

{

int address;

if (y ==0) address = 0x80 + x;

else address = 0xC0 + x;

LCD_Command_Write(address);

}

void LCD_Write_Char( int x,int y,int dat)

{

LCD_SET_XY( x, y );

LCD_Data_Write(dat);

}

void LCD_Write_String(int X,int Y,char *s)

{

LCD_SET_XY( X, Y ); //set address

while (*s) //write the string

{

LCD_Data_Write(*s);

s ++;

}

void setup (void)

{

int i = 0;

for (i=6; i <= 12; i++)

{

pinMode(i,OUTPUT);

}

delay(100);

LCD_Command_Write(0x28);

delay(50);

LCD_Command_Write(0x06);

delay(50);

LCD_Command_Write(0x0c);

delay(50);

LCD_Command_Write(0x80);

delay(50);

LCD_Command_Write(0x01);

delay(50);

}

void loop (void)

{

LCD_Command_Write(0x01);

delay(50);

LCD_Write_String(3,0,str1); //Row1, column4

delay(50);

LCD_Write_String(1,1,str2); //Row2, column2

delay(5000);

LCD_Command_Write(0x01);

delay(50);

LCD_Write_String(0,0,str3);

delay(50);

LCD_Write_String(0,1,str4);

delay(5000);

}

Download the source code

Starter #10 Driving 7 Segment Digital Display with Arduino with Source Code

Here the steps how to wire and driving the 7 segment digital display using Arduino. Electronic Parts Required ARDUINO UNO/MEGA/PRO 4x Seven Segment Digital Display 8x 220 k Resistor

/*
    .  .          ........ .... ..   ......      ........                       
MMMM   MMMMM    MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM                       
 MMM.MMMMMMM   MMM      MMM     .MM.MMM     MMM .........      .... ... .  . .  
MMM MMMMMMM . .MM.      MM.     MMM MM.  . MMM MMMMMMMMM       MMMM MMMMM.MM MM
MMMMMMMMMMMM. .MMM      MMM.  .MMM.MMMMMMMMM  ........    MMM MM  . M .MMMMMMMM.
MMM    .MMM     MMMMMMMM.MMMMMMM.  MM    .MMM. MMMMMMMM.  MMM .MMMM MMMM MMMMMM.
www.14core.com                                             .   ...  . .  ......
*/

int a = 1;
int b = 2;
int c = 3;
int d = 4;
int e = 5;
int f = 6;
int g = 7;
int p = 8;

int d4 = 9;
int d3 = 10;
int d2 = 11;
int d1 = 12;

long n = 0;
int x = 100;
int del = 55;
 
void setup()
{
  pinMode(d1, OUTPUT);
  pinMode(d2, OUTPUT);
  pinMode(d3, OUTPUT);
  pinMode(d4, OUTPUT);
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(p, OUTPUT);
  pinMode(13,INPUT);
}
 
void loop()
{
  clearLEDs();
  pickDigit(1);
  pickNumber((n/x/1000)%10);
  delayMicroseconds(del);
 
  clearLEDs();
  pickDigit(2);
  pickNumber((n/x/100)%10);
  delayMicroseconds(del);
   
  clearLEDs();
  pickDigit(3);
  dispDec(3);
  pickNumber((n/x/10)%10);
  delayMicroseconds(del);
 
  clearLEDs();
  pickDigit(4);
  pickNumber(n/x%10);
  delayMicroseconds(del);
 
  n++;
/*
When you need to put the numbers to zero,
you may use this function

ClearDigital();

*/
 
 //ClearDigital();
 
}
 
void pickDigit(int x)
{
  digitalWrite(d1, HIGH);
  digitalWrite(d2, HIGH);
  digitalWrite(d3, HIGH);
  digitalWrite(d4, HIGH);
 
  switch(x)
  {
  case 1:
    digitalWrite(d1, LOW);
    break;
  case 2:
    digitalWrite(d2, LOW);
    break;
  case 3:
    digitalWrite(d3, LOW);
    break;
  default:
    digitalWrite(d4, LOW);
    break;
  }
}
 
void pickNumber(int x)
{
  switch(x)
  {
  default:
    zero();
    break;
  case 1:
    one();
    break;
  case 2:
    two();
    break;
  case 3:
    three();
    break;
  case 4:
    four();
    break;
  case 5:
    five();
    break;
  case 6:
    six();
    break;
  case 7:
    seven();
    break;
  case 8:
    eight();
    break;
  case 9:
    nine();
    break;
  }
}
 
void dispDec(int x)
{
  digitalWrite(p, LOW);
}
 
void clearLEDs()
{
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  digitalWrite(p, LOW);
}
 
void zero()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}
 
void one()
{
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}
 
void two()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}
 
void three()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}
 
void four()
{
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}
 
void five()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}
 
void six()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}
 
void seven()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}
 
void eight()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}
 
void nine()
{
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}
/*
you can add a button, please refer to 14Core Starter #3 Button Control.
keep the Pin13 all high.
when push the button, it become LOW.
n=0;
*/
void ClearDigital()
{
if(digitalRead(13)== LOW)
{
n=0;
}  
}

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. . ........ .... .. ...... ........

MMMM MMMMM MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM

MMM.MMMMMMM MMM MMM .MM.MMM MMM ......... .... ... . . .

MMM MMMMMMM . .MM. MM. MMM MM. . MMM MMMMMMMMM MMMM MMMMM.MM MM

MMMMMMMMMMMM. .MMM MMM. .MMM.MMMMMMMMM ........ MMM MM . M .MMMMMMMM.

MMM .MMM MMMMMMMM.MMMMMMM. MM .MMM. MMMMMMMM. MMM .MMMM MMMM MMMMMM.

www.14core.com . ... . . ......

int a = 1;

int b = 2;

int c = 3;

int d = 4;

int e = 5;

int f = 6;

int g = 7;

int p = 8;

int d4 = 9;

int d3 = 10;

int d2 = 11;

int d1 = 12;

long n = 0;

int x = 100;

int del = 55;

void setup()

{

pinMode(d1, OUTPUT);

pinMode(d2, OUTPUT);

pinMode(d3, OUTPUT);

pinMode(d4, OUTPUT);

pinMode(a, OUTPUT);

pinMode(b, OUTPUT);

pinMode(c, OUTPUT);

pinMode(d, OUTPUT);

pinMode(e, OUTPUT);

pinMode(f, OUTPUT);

pinMode(g, OUTPUT);

pinMode(p, OUTPUT);

pinMode(13,INPUT);

}

void loop()

{

clearLEDs();

pickDigit(1);

pickNumber((n/x/1000)%10);

delayMicroseconds(del);

clearLEDs();

pickDigit(2);

pickNumber((n/x/100)%10);

delayMicroseconds(del);

clearLEDs();

pickDigit(3);

dispDec(3);

pickNumber((n/x/10)%10);

delayMicroseconds(del);

clearLEDs();

pickDigit(4);

pickNumber(n/x%10);

delayMicroseconds(del);

n++;

When you need to put the numbers to zero,

you may use this function

ClearDigital();

//ClearDigital();

}

void pickDigit(int x)

{

digitalWrite(d1, HIGH);

digitalWrite(d2, HIGH);

digitalWrite(d3, HIGH);

digitalWrite(d4, HIGH);

switch(x)

{

case 1:

digitalWrite(d1, LOW);

break;

case 2:

digitalWrite(d2, LOW);

break;

case 3:

digitalWrite(d3, LOW);

break;

default:

digitalWrite(d4, LOW);

break;

}

void pickNumber(int x)

{

switch(x)

{

default:

zero();

break;

case 1:

one();

break;

case 2:

two();

break;

case 3:

three();

break;

case 4:

four();

break;

case 5:

five();

break;

case 6:

six();

break;

case 7:

seven();

break;

case 8:

eight();

break;

case 9:

nine();

break;

}

void dispDec(int x)

{

digitalWrite(p, LOW);

}

void clearLEDs()

{

digitalWrite(a, LOW);

digitalWrite(b, LOW);

digitalWrite(c, LOW);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

digitalWrite(p, LOW);

}

void zero()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

digitalWrite(g, LOW);

}

void one()

{

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

}

void two()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, LOW);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

}

void three()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, HIGH);

}

void four()

{

digitalWrite(a, LOW);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

}

void five()

{

digitalWrite(a, HIGH);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

}

void six()

{

digitalWrite(a, HIGH);

digitalWrite(b, LOW);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

}

void seven()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, LOW);

digitalWrite(e, LOW);

digitalWrite(f, LOW);

digitalWrite(g, LOW);

}

void eight()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, HIGH);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

}

void nine()

{

digitalWrite(a, HIGH);

digitalWrite(b, HIGH);

digitalWrite(c, HIGH);

digitalWrite(d, HIGH);

digitalWrite(e, LOW);

digitalWrite(f, HIGH);

digitalWrite(g, HIGH);

}

you can add a button, please refer to 14Core Starter #3 Button Control.

keep the Pin13 all high.

when push the button, it become LOW.

n=0;

void ClearDigital()

{

if(digitalRead(13)== LOW)

{

n=0;

}

Download the source code here | 14Core Digital Display

Starter #9 Temperature Detection and Measuring with LM35

Lear how to detect Temperature using Arduino with LM35 Electronic parts requirements. Arduino UNO/MEGA/PRO 3x LED 3x 220k Resistor 1x LM35 Temperature Sensor Jumper wires

/*
    .  .          ........ .... ..   ......      ........                       
MMMM   MMMMM    MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM                       
 MMM.MMMMMMM   MMM      MMM     .MM.MMM     MMM .........      .... ... .  . .  
MMM MMMMMMM . .MM.      MM.     MMM MM.  . MMM MMMMMMMMM       MMMM MMMMM.MM MM
MMMMMMMMMMMM. .MMM      MMM.  .MMM.MMMMMMMMM  ........    MMM MM  . M .MMMMMMMM.
MMM    .MMM     MMMMMMMM.MMMMMMM.  MM    .MMM. MMMMMMMM.  MMM .MMMM MMMM MMMMMM.
www.14core.com                                              .   ...  . .  ......
*/

void setup() {
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT); //defines all the LED pins to output
  Serial.begin(9600);
}
void loop() {
  int vol = analogRead(A0) * (5.0 / 1023.0*100);   //analog read the temperature sensor voltage
Serial.print(" The temperature is:");
Serial.println(vol);
if (vol<=31)                                               //if the temperature is low
{
  digitalWrite(13, HIGH);
  digitalWrite(12, LOW);
  digitalWrite(11, LOW);
}
else if (vol>=32 && vol<=40)                // if the temperature is middle            
 {
   digitalWrite(13, LOW);

  digitalWrite(12, HIGH);
  digitalWrite(11, LOW);
}
else if (vol>=41)                                  //If the temperature is HIGH
{
   digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
}
delay(100);
 }

. . ........ .... .. ...... ........

MMMM MMMMM MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM

MMM.MMMMMMM MMM MMM .MM.MMM MMM ......... .... ... . . .

MMM MMMMMMM . .MM. MM. MMM MM. . MMM MMMMMMMMM MMMM MMMMM.MM MM

MMMMMMMMMMMM. .MMM MMM. .MMM.MMMMMMMMM ........ MMM MM . M .MMMMMMMM.

MMM .MMM MMMMMMMM.MMMMMMM. MM .MMM. MMMMMMMM. MMM .MMMM MMMM MMMMMM.

www.14core.com . ... . . ......

void setup() {

pinMode(13, OUTPUT);

pinMode(12, OUTPUT);

pinMode(11, OUTPUT); //defines all the LED pins to output

Serial.begin(9600);

}

void loop() {

int vol = analogRead(A0) * (5.0 / 1023.0*100); //analog read the temperature sensor voltage

Serial.print(" The temperature is:");

Serial.println(vol);

if (vol<=31) //if the temperature is low

{

digitalWrite(13, HIGH);

digitalWrite(12, LOW);

digitalWrite(11, LOW);

}

else if (vol>=32 && vol<=40) // if the temperature is middle

{

digitalWrite(13, LOW);

digitalWrite(12, HIGH);

digitalWrite(11, LOW);

}

else if (vol>=41) //If the temperature is HIGH

{

digitalWrite(13, LOW);

digitalWrite(12, LOW);

digitalWrite(11, HIGH);

}

delay(100);

}

Download the source code here | 14COre Temprature Measuring

Starter #9 Light Detection with (LDR) Light-Dependent Resistor with Arduino

Detecting a light or making a switch using Photoresistor interface with Arduino. Electronic Components Required Arduino UNO/MEGA/PRO 1x LED 1x 220k Ohm Resistor 1x 10k Resistor 1x LDR(Photo resistor)

/*
    .  .          ........ .... ..   ......      ........                       
MMMM   MMMMM    MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM                       
 MMM.MMMMMMM   MMM      MMM     .MM.MMM     MMM .........      .... ... .  . .  
MMM MMMMMMM . .MM.      MM.     MMM MM.  . MMM MMMMMMMMM       MMMM MMMMM.MM MM
MMMMMMMMMMMM. .MMM      MMM.  .MMM.MMMMMMMMM  ........    MMM MM  . M .MMMMMMMM.
MMM    .MMM     MMMMMMMM.MMMMMMM.  MM    .MMM. MMMMMMMM.  MMM .MMMM MMMM MMMMMM.
                                                           .   ...  . .  ......
*/

int photocellPin = 2;//define the LDR to D2;
int ledPin =12;
int val =0; //val to store the data;
void setup(){
pinMode(ledPin,OUTPUT);//set the ledPin to output;
Serial.begin(9600);
}
void loop(){
val = analogRead(photocellPin);
Serial.println("current light is");
Serial.println(val);
if (val<350){
//512 =2.5V, you can modify this to adjust the sensitivity;
digitalWrite(ledPin,HIGH);
}
else{
digitalWrite(ledPin,LOW);
}
delay(1000);
}

. . ........ .... .. ...... ........

MMMM MMMMM MMMMMMMMMMMMMMMMMMM MMMMMMMMMM. MMMMMMMMM

MMM.MMMMMMM MMM MMM .MM.MMM MMM ......... .... ... . . .

MMM MMMMMMM . .MM. MM. MMM MM. . MMM MMMMMMMMM MMMM MMMMM.MM MM

MMMMMMMMMMMM. .MMM MMM. .MMM.MMMMMMMMM ........ MMM MM . M .MMMMMMMM.

MMM .MMM MMMMMMMM.MMMMMMM. MM .MMM. MMMMMMMM. MMM .MMMM MMMM MMMMMM.

. ... . . ......

int photocellPin = 2;//define the LDR to D2;

int ledPin =12;

int val =0; //val to store the data;

void setup(){

pinMode(ledPin,OUTPUT);//set the ledPin to output;

Serial.begin(9600);

}

void loop(){

val = analogRead(photocellPin);

Serial.println("current light is");

Serial.println(val);

if (val<350){

//512 =2.5V, you can modify this to adjust the sensitivity;

digitalWrite(ledPin,HIGH);

}

else{

digitalWrite(ledPin,LOW);

}

delay(1000);

}

Download the source code here | 14Core Light Detection

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