Week 9 Assignment (Car Sensors)

Inspiration
Car sensors. Whenever an object or car comes very close to our car, it starts beeping and lighting. That was my motivation to create this sensor.

Video/Image

Work

Basically, as an object comes closer to the Ultrasonic sensor, the bulb lights. For the switch, I added a bulb connected switch- simply press the button.

Challenges

I had many issues with this assignment. It was mainly faulty jumper wires and Arduino’s functioning on Mac. At first, Changing jumper wires solved the issue of Ultrasonic sensor’s distance capture. I spent majority time on solving this 'avrdude: stk500_recv():' error. Re-installed the drivers, added new libraries, etc and magically it just started working!

Code

#include <NewPing.h>

const int trig = 12;
const int echo = 13;
const int led = 2;

int duration = 0;
int distance = 0;

void setup() 
{
  pinMode(trig , OUTPUT);
  pinMode(echo , INPUT);
 
  pinMode(led , OUTPUT);
  
  Serial.begin(9600);

}

void loop()
{
  digitalWrite(trig , HIGH);
  delayMicroseconds(200);
  digitalWrite(trig , LOW);

  duration = pulseIn(echo , HIGH);
  distance = (duration/2)  ;
  
  Serial.println(distance);
  
  if ( distance <= 10 )
  {
    digitalWrite(led, HIGH);
  }
  else
  {
    digitalWrite(led, LOW);
  }
}