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

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

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