Week 7 - Journal

I needed this assignment idea to be related to the servo motor, so I can be more familiar with it since a big portion of my final project is based on it, upon a few searches, I found a very relatable application that may be applied to many applications in out daily life, and it is the car parking system using ultrasonic sensor and LDR module.

Here is the link of inspiration:
https://create.arduino.cc/projecthub/guruashishchoudhary29/automatic-parking-system-81d9fa

Tinkercad

Used to simulate electrical circuits and components, so you can calibrate your circuit calculations and needs before even going to the hardware steps.

Tools and Materials

Arduino Uno Board
Ultrasonic Sensor
LDR Module
Servo Motor
LED
Breadboard
Jumpers and Wires

Arduino IDE

Used to compile the code written in the programming sketches and upload it directly to our Arduino Board.

Input Components:
- Ultrasonic senor.
- LDR module.

Output components:
- Servo motor.
- LED.

So the first thing the code does is processing the data of both ultrasonic sensor and LDR modules.

The ultrasonic sensor takes the distance between it and the first object front of it.

The LDR module gives us a digital status, whether anything blocks it from all the sources of light or not.

So if BOTH the distance equals to or less than 5 cm and the LDR module is blocked from light, only then, the garage door is opened using servo motor and a LED is powered on, else, the LED will be off and the servo will return to its initial state.

The code consists of 9 parts, which will be explained in the following lines:

• Part 1:
  It is basically summoning all the libraries we will want to use in this program, in our case the servo motor library.

• Part 2:
  Defining all the instances of the hardware components we will use.

• Part 3:
  In this part we stored the pins numbers in meaningful variables so it can be easily used across the code without any problem, this is called decoupling.

• Part 4:
  Initiating the variables that will be used by the sensors.

• Part 5:
  Initiating hardware components and setting the state for every used pin.

• Part 6:
  Measuring light intensity by LDR module and storing result in variable while printing it in serial monitor.

• Part 7:
  Measuring distance between the sensor and the object in front of, while storing the result in variable and printing it in serial monitor.

• Part 8:
  Defining the condition to open the garage door.

• Part 9:
  Defining the default state when no object is infront of the garage door.