Photosensitive Timing Infrared LED Control System Based On Arduino

By on March 17, 2015

Web site:

http://www.instructables.com/id/Photosensitive-Timing-Infrared-LED-Control-System-/

Project Summary:

ICStation Team introduce you this Photosensitive timing infrared LED control system. This system uses DC5V voltage to work.When the intensity of light is weak and somebody appears in the infrared area, the LED will be on. While the intensity of environmental light is strong enough or nobody appears in the area of infrared induction, the LED will be off. The 4-bit digital tube will display the time.The buzzer will alarm for 20 seconds during the 24 o’clock at midnight.And from 24 o’clock to the 8 o’clock in the morning is the manual control.It is a simple, low-cost LED control system. It is suitable for the illumination in the area such as office, warehouse, guard room.

Full Project:

Functions

1) When start up, the hardware initialized and the LED will flash. The 4-bit digital tube display the initialized time 23:59.

2)When nobody appears in the infrared induction area, the LED will not light.

3)When the intensity of environmental light is weak and somebody is appearing in the infrared induction area, the LED will light till the person leaves the infrared induction area.

4) On 24 o’clock at midnight, the buzzer will alarm and the LED will switch to the manual control till 8 o’clock in the morning.

5)You can set the time by the switches.

Step 1: Components list

1)Arduino mega

2)830 Point Solderless PCB Bread Board MB-102 Test DIY

3)Round White Green Superbright Bulb Light

4)5mm Infrared Emitting LED

5)TL1838 VS1838B VS1838 Universal Receiving Head

6)Active Buzzer Module for Arduino

7)Breadboard Plug Wire Cable Tire

8)12X12X5mm Tact Switches 4 Legs

9)1K ohm 1/4W 1% Accuracy Metal Film Resistor

10)Common Cathode 4bit Digital Tube

11)+5V DC power supply

Step 2: Lead to the power supply line and GND

Plug the +5V power supply line and GND from Arduino Mega into the bread board. The red bread wire is the power supply line and the black bread wire is the GND

Step 3: Connection of 4-bit digital tube

According to the schematic diagram, connect the 4-bit digital tube with Arduino mega.

Step 4: The connection of the buzzer

1.Put the buzzer on the bread board

2.Connect the pin 1 of the buzzer to the anode, and pin 3 of the buzzer to the cathode, the pin 2 of the buzzer to the pin 47 of Arduino mega

Step 5: The connection of the infrared receiving tube

1.Place the infrared receiving tube on the bread board

2.Connect the pin 1 of the infrared receiving tube to the 220K current-limiting resistance and A3 pin fo the arduino Mega. Connect the pin 2 of the infrared receiving tube to the cathode and pin 3 of the infrared receiving tube to the pin 51 of Arduino Mega

Step 6: The connection of photoresistance

1.Place the photoresistance on the bread board

2.Connect the pin 1 of the photoresistance to the GND, and pin 2 of the photoresistance to the A2 pin of the Arduino Mega, and connect a 220K resistance in series.

Step 7: The connection of LED

Connect the pin 1 of LED to the A5 and pin 46 of the Arduino Mega , and connect the pin 2 of LED to the cathode.

Step 8: The connection of switches and 1K current-limiting resistance

1.Place four switches and 1K current-limiting resistance on the bread board.

2.Connect the pin 1 of all four switches to the +5V, and pin 3 to the GND. Connect pin 2 of the hour switch to the A4, and connect pin2 of minute switch to A1;connect the pin2 of +/- switch to A0; Connect the pin2 of on/off switch to A6

Step 9: The experimental effect

Step 10: Video to show the effect

 

 

 

 

 

Circuit diagram:

 

Software & Code Snippets:

/*This digital tube is commen cathode*/
//set the interface of anode
int a = 26;
int b = 50;
int c = 48;
int d = 46;
int e = 42;
int f = 40;
int g = 38;
int dp = 36;
int ajs=4;
int ajf=1;
int kg = 6;
int cs = 1;
//set the interface of cathode
int d4 = 34;
int d3 = 32;
int d2 = 30;
int d1 = 28;
//set the viriate
long n = 7;
long k = 5;
long l = 3;
long m = 2;
long t = 0;
byte duan_segs[8] = { a, b, c, d, e, f, g, dp};
byte wei_segs[4] = { d1, d2, d3, d4 };
byte seven_seg_digits[10][7] = { { 1,1,1,1,1,1,0 },  // = 0
                                 { 0,1,1,0,0,0,0 },  // = 1
                                 { 1,1,0,1,1,0,1 },  // = 2
                                 { 1,1,1,1,0,0,1 },  // = 3
                                 { 0,1,1,0,0,1,1 },  // = 4
                                 { 1,0,1,1,0,1,1 },  // = 5
                                 { 1,0,1,1,1,1,1 },  // = 6
                                 { 1,1,1,0,0,0,0 },  // = 7
                                 { 1,1,1,1,1,1,1 },  // = 8
                                 { 1,1,1,1,0,1,1 }   // = 9
                             }; 
//the time of last opperating
unsigned long previousMillis = 0; 
//The minimum time interval
int INTERVAL = 1000;
//flag represents three mode£¬0-stop£¬1-timing£¬2-suspend
int flag = 1;
//Simulation of the mouth A0
int BUTTON = 0;
void setup()
{ 
  pinMode( 51 , OUTPUT);
  digitalWrite(51,LOW);
  digitalWrite(49,LOW);
  digitalWrite(47,HIGH);
  digitalWrite( A5 , LOW );
  Serial.begin(9600);
  pinMode( 47 , OUTPUT);
  for(int i=0;i<4;i++)
    pinMode(wei_segs[i], OUTPUT);
  for(int i=0;i<8;i++)
    pinMode(duan_segs[i], OUTPUT); 
}
 
void loop()
{        
    clearLEDs();
    pickDigit(1);
    lightSegments(m%10);
    dkg();
    jianyis();
      
    clearLEDs();
    pickDigit(2);
    lightSegments(l%10); 
    jiayis();
    
    clearLEDs();
    pickDigit(3);
    lightSegments(k%10);
     LED();    
    
    clearLEDs();
    pickDigit(4);
    lightSegments(n%10);
    zs();
    jishi();
    keyScan();
    jiayif();
    jianyif();    
    fmqx();
    fmqt();    
  // fmqx();
   //fmqt();
   //LED();
    //keyScan();
   // jiayis();
   // jianyis();
  //jiayif();
   //jianyif();
   // zs();
  // dkg();

   
  }

 
void pickDigit(int x)  //Define pickDigit(x),the function is to open dx interface 
{
  for(int i=0;i<4;i++)
  {
    if(i == (x-1))
      digitalWrite(wei_segs[i], LOW); 
    else
      digitalWrite(wei_segs[i], HIGH);    
  }
}
 
//set open point

 
//clear screen
void clearLEDs()  
{
  for (int i = 0; i < 8; i++) 
    digitalWrite(duan_segs[i], LOW);
}
 
 
//  light corresponding Numbers of Digital tube
void lightSegments(int x) 
{
  for (int i = 0; i < 7; i++) 
  {
    digitalWrite(duan_segs[i], seven_seg_digits[x][i]);
  }
}
 //keyscan
void keyScan()
{
  if(analogRead(BUTTON)>600)
   {
     delay(20);
     if(analogRead(BUTTON)>600)
     {
       flag++;
       if(flag>=3)
         flag=1;
       while(analogRead(BUTTON)>600);
     }
   }
}
//¹âÃôºì
void LED()
{
Serial.print( analogRead(A2) );
Serial.println("");
Serial.print( analogRead(A3) );
Serial.println("");
if (( ( ( analogRead(A2) ) < ( 400) ) && ( ( 120 ) < ( analogRead(A3) ) ) ))
{
digitalWrite( A5 , HIGH );
}
else
{
digitalWrite( A5 , LOW );
}
}
//   The hour add 1
void jiayis()
{  Serial.print( analogRead(A2) );
  Serial.println("");
  Serial.print( analogRead(A3) );
  Serial.println("");
  if(((analogRead(ajs)>600))&&(flag==1))
  {
         delay(20);
     if(((analogRead(ajs)>600))&&(flag==1))  
     {  t=0;
        l++;
        if(l==10)
        {
        m++;
        l=0;           
          }
         if((m==2)&&(l==4))
          {  n=0;
             k=0;
             l=0;
             m=0;             
        }        
       while(((analogRead(ajs)>600))&&(flag==1));
     }
  }   
}

//   the hour minus 1
void jianyis()
{
  if(((analogRead(ajs)>600))&&(flag==2))
  {
         delay(20);
     if(((analogRead(ajs)>600))&&(flag==2))  
     {  t=0;
        l--;
        if((l==-1)&&((m==1)||(m==2)))
        {
        m--;
        l=9;           
          }
         if((m==0)&&(l==-1))
          {  
             l=3;
             m=2;
             
        }        
       while(((analogRead(ajs)>600))&&(flag==2));
     }
  }   
}

//the minute add 1
void jiayif()
{  
  if(((analogRead(ajf)>600))&&(flag==1))
  {
         delay(20);
     if(((analogRead(ajf)>600))&&(flag==1));  
     {  t=0;
        n++;
          if(n==10)
          {
          k++;
          n=0;
          if(k==6)
          {
          n=0;
          k=0;
          l++;
        if(l==10)
        {
        m++;
        l=0;           
          }
         if((m==2)&&(l==4))
          {  n=0;
             k=0;
             l=0;
             m=0;             
        }
          }
          }        
       while(((analogRead(ajf)>600))&&(flag==1));
     }
  }   
}

//the minute minus 1
void jianyif()
{
  if(((analogRead(ajf)>600))&&(flag==2))
  {
         delay(20);
     if(((analogRead(ajf)>600))&&(flag==2));  
     {  t=0;
        n--;
          if(n==-1)
          {
          k--;
          n=9;
          if((k==-1))
          {
          n=9;
          k=5;
          l--;
        if(l==-1)
        {
        m--;
        l=9;           
          }
         if((m==-1)&&(l==9))
          {  
             l=3;
             m=2;             
        }
          }
          }        
       while(((analogRead(ajf)>600))&&(flag==2));
     }
  }   
}
//the buzzer alram
void fmqx()
{
if((n==0)&&(k==0)&&(l==0)&&(m==0)&&(t==0))
    {
      digitalWrite(47,LOW);
      digitalWrite(51,HIGH);
    }
}
//the buzzer stop
void fmqt()
{
if((n==0)&&(k==0)&&(l==0)&&(m==0)&&(t==20))
    {
      digitalWrite(47,HIGH);
    }
}

void zs()
{ Serial.print( analogRead(A2) );
  Serial.println("");
if((l==8)&&(m==0))
    {
    digitalWrite(51,LOW);  
    }
}
//manual contor the light
void dkg()
{  
   Serial.print( analogRead(A3) );
   Serial.println("");
  if((analogRead(kg)>200)&&(( ( 120 ) < ( analogRead(A3) ) )))
   {
     delay(20);
     if((analogRead(kg)>200)&&( ( 120 ) < ( analogRead(A3) ) ))
     { cs++; 
      digitalWrite(49,HIGH);
      if(cs==3)
      {
       digitalWrite(49,LOW);
        cs=1; 
      }
       while((analogRead(kg)>200)&&( ( 120 ) < ( analogRead(A3) ) ));
     }
   }
}
void jishi()
{
 if((flag == 1)||(flag==2))//timing mode 
    {
      unsigned long currentMillis=millis();//The current operating time
      if(currentMillis - previousMillis >= INTERVAL)
      {   t++;
         if(t==60)
         {
          n++;
          t=0;
          } 
        previousMillis=currentMillis;
         if(n==10)
        {
          k++;
          n=0;
          if(k==6)
          {
          l++;
          k=0;
           if((m==2)&&(l==4))
          {  n=0;
             k=0;
             l=0;
             m=0;                                                                   
          } 
          
          if(l==10)
          {
          m++;
          l=0;
         
          }
          }
        }
         
      }
    }
}

 

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