Reverse Parking Sensor Robotic Kit

Reverse Parking Sensor Robotic Kit

What It Does (Yeh Kya Karta Hai?)

Is project mein Ultrasonic Sensor aankhon ka kaam karega aur 7-Segment Display screen ka kaam karega.

  • Door (Far): Screen par '9' show hoga (Matlab safe hai).
  • Qareeb (Near): Jaise jaise haath ya deewar qareeb aayegi, number kam hota jayega (8, 7, 6... 1).
  • Bilkul Qareeb (Danger): Screen par '0' show hoga (Matlab Takkar!).

Components Required

  • Microcontroller: Arduino Uno
  • Breadboard
  • Ultrasonic Sensor (HC-SR04)
  • 7-Segment Display (1-Digit)
  • 220 ohm Resistor (Red-Red-Brown) - Display ko protect karne ke liye
  • Jumper Wires

Wiring (Taarein Jorna)

Wiring thori dhiyaan se karein kyun ke taarein (wires) zyada hain.

A. Ultrasonic Sensor:

  • VCC: Arduino 5V
  • GND: Arduino GND
  • Trig: Arduino Pin 10
  • Echo: Arduino Pin 11

B. 7-Segment Display (Important!)

Step 1: Common Connection (Resistor Yahan Lagega)

Display ki Neeche wali line mein jo Beech wala Pin (Pin 3) hai:

  • Us Pin se Resistor jodein.
  • Resistor ka doosra sira Arduino GND mein lagayen. (Is se sab LEDs safe rahengi).

Step 2: Segments Connection (A to G)

🔻 Neeche Wali Line (Left se shuru karein):

  1. Pehli Pin (E): → Arduino Pin 6
  2. Dusri Pin (D): → Arduino Pin 5
  3. Teesri (Common): → Yeh humne Resistor/GND se jod di hai.
  4. Chothi Pin (C): → Arduino Pin 4
  5. Paanchvi (Dot): → Khali chhor dein.

🔺 Upar Wali Line (Left se shuru karein):

  1. Pehli Pin (G): → Arduino Pin 8
  2. Dusri Pin (F): → Arduino Pin 7
  3. Teesri (Common): → Khali chhor dein (Neeche wali ground kaafi hai).
  4. Chothi Pin (A): → Arduino Pin 2
  5. Paanchvi Pin (B): → Arduino Pin 3

 

🛒 Buy This Robotic Kit Now

Code

/*
 * Project 32: Reverse Parking Sensor
 * Platform: PlzPapa Robotic Kit
 * * Logic:
 * Distance > 30cm = Show 9 (Safe)
 * Distance < 5cm  = Show 0 (Danger)
 */

// Ultrasonic Pins
const int trigPin = 10;
const int echoPin = 11;

// 7-Segment Pins (a,b,c,d,e,f,g)
int segPins[] = {2, 3, 4, 5, 6, 7, 8};

// Numbers 0-9 ka pattern (1 = ON, 0 = OFF) for Common Cathode
byte numbers[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
};

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
  // Saari segment pins ko OUTPUT banao
  for (int i = 0; i < 7; i++) {
    pinMode(segPins[i], OUTPUT);
  }
  Serial.begin(9600);
}

void loop() {
  // 1. Distance Measure karo
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 29.1; // cm mein convert

  Serial.print("Distance: ");
  Serial.println(distance);

  // 2. Distance ko 0 se 9 ke number mein convert karo
  int displayNum;
  
  if (distance > 30) {
    displayNum = 9; // Bohat door hai (Safe)
  } else if (distance < 5) {
    displayNum = 0; // Takkar honay wali hai!
  } else {
    // 5cm se 30cm ke beech map karo (reverse order mein)
    displayNum = map(distance, 5, 30, 0, 9);
  }

  // 3. Screen par number dikhao
  showNumber(displayNum);
  
  delay(100);
}

// Number dikhane ka function
void showNumber(int num) {
  for (int i = 0; i < 7; i++) {
    digitalWrite(segPins[i], numbers[num][i]);
  }
}

 

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