Internet of Things

Police Strobe Light Using Arduino

Introduction

 
 In my last article, I explained about Remote Control using the Arduino Uno. In this article, I will explain about Police Strobe Light using Arduino. 
 
List of Parts
  • 2  Red Led
  • 2  Blue Led 
  • Arduino Uno
  • Potentiometer 
  • Bread Board
  • Jumper Wires.
Connection
 
Step 1: Connect the Arduino Uno board to the pc using a USB cable. 
 
Step 2: Fix LEDs and potentiometer in the bread board
 
Step 3: 
POTENTIOMETER CONNECTION 
                                   
 
Figure 1: Potentiometer
 
Step 4: Connect the potentiometer to the Arduino Board as in the preceding figure 1. 
 
Step 5: Potentiometer Centre leads to Analog 0 pin in Arduino Board.
 
Step 6: Fix the 2 red LEDs in the bread board, then commonly connect the positive pins (+) together and negative pins (-) together.
 
Step 7: Take an Anode pin to digital pin 11 and Cathode to gnd.
 
Step 8: Fix the 2 blue LEDs in the bread board, and then connect the positive pins (+) together and negative pins (-) together.
 
Step 9: Take an Anode pin to digital pin 12 and Cathode to gnd.
 
Programming
  1. const int analogInPin = A0; // Analog input pin in potentiometer to be attached.     
  2. int sensorvalue = 0;    
  3. int timer = 0;    
  4. void setup()    
  5. {    
  6.     pinMode(12, OUTPUT);    
  7.     pinMode(11, OUTPUT);    
  8. }    
  9. void loop()    
  10. {    
  11.     sensorValue = analog Read(analogInPin);    
  12.     timer = map(sensorValue, 0, 1023, 10, 500); //time delay.    
  13.     digitalWrite(12, HIGH);    
  14.     delay(timer);    
  15.     digitalWrite(12, LOW);    
  16.     delay(timer);    
  17.     digitalWrite(12, HIGH);    
  18.     delay(timer);    
  19.     digitalWrite(12, LOW);    
  20.     delay(timer);    
  21.     digitalWrite(11, HIGH);    
  22.     delay(timer);    
  23.     digitalWrite(11, LOW);    
  24.     delay(timer);    
  25.     digitalWrite(11, HIGH);    
  26.     delay(timer);    
  27.     digitalWrite(11, LOW);    
  28.     delay(timer);    
  29. }    
 
Figure 2: Police Strobe Light
 
Explanation
  • LEDs can blink lightly one by one automatically, we can adjust the potentiometer and see the changes in LEDs blink.
  • const int analogInPin = The input from the potentiometer to the Arduino board.
  • The strobe lights are used in Ambulance, Fire engine in Emergency situation.

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