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 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 bread board, then commonly connect the  postive 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 bread board, and then connect the postive pins (+) together and negative pins (-) together.

Step 9: Take an Anode pin to digital pin 12 and Cathode to gnd.

 

Programming

const int analogInPin = A0; // Analog input pin in potentiometer to be attached.
int sensorvalue = 0;
int timer = 0;
void setup()
{
    pinMode(12, OUTPUT);
    pinMode(11, OUTPUT);
}
void loop()
{
    sensorValue = analog Read(analogInPin);
    timer = map(sensorValue, 0, 1023, 10, 500); //time delay.
    digitalWrite(12, HIGH);
    delay(timer);
    digitalWrite(12, LOW);
    delay(timer);
    digitalWrite(12, HIGH);
    delay(timer);
    digitalWrite(12, LOW);
    delay(timer);
    digitalWrite(11, HIGH);
    delay(timer);
    digitalWrite(11, LOW);
    delay(timer);
    digitalWrite(11, HIGH);
    delay(timer);
    digitalWrite(11, LOW);
    delay(timer);
}

 
            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 Arduino board.
• The strobe lights are used in Ambulance, Fire engine in Emergency situation.