Week 7 - Journal

Ideation

Tell us about your assignment's idea for this week. Why do you care about this idea? What inspired you? (Please include images or links to sources of inspiration)

This week’s assignment was that we should build a smart system on Arduino-controlled locked doors using a keypad, switch, LCD, servo motor, with buzzer. In the event the correct code is entered, the door unlocks without a sound, but an incorrect code keeps the door locked, and it makes an alert for preventing the outsiders. The LCD provides with clear instructions and with feedback, so that the system has some smart features and it is secure. This guarantees access control that is safe.

Tool Chain

Which software/machines/materials did you use in the assignment? Why?

Software Materials: Electronic Tools

Tinkercad

Arduino IDE

Switch ON/OFF

Servo motor : Open/Close

Buzzer

Resistor 220 ohms 5V adapter

Jumper wires

Cable for Arduino Uno

Keypad Password

Breadboard

Arduino Uno

Materials: Crafting Tools

Design/Preparation Process

Explain the design and/or preparation process of your assignment. How did you use the tool or software to design and/or prepare your assignment before fabrication/implementation?

TinkerCad Project: Arduino, switch, keypad, LCD, servo motor, and buzzer

I did build such a simple door lock system with just an Arduino Uno, along with a switch, along with a servo motor, along with a keypad, an LCD screen, and a buzzer was then used. To guide the user, the switch is used to activate and desactvate the circuit, the keypad is used to enter a passcode, also the LCDs messages like “Enter password”, “Access Granted,” or “Access Denied.” The servo rotates to unlock the door at the time when the correct code is entered. By the buzzer a short confirmation beep is then given. When the wrong code is entered, the servo stays locked, and an alert sounds from the buzzer. All components are neatly wired to the breadboard’s 5V and GND rails for easy organization and testing because the Arduino powers the entire system.

Here:

Switch and Keypad are the inputs.
LCD is the display, shows the messages
Servo motor and Buzzer are the outputs.

TinkerCad Simulation

I started connecting the Arduino’s ground (GND) to the negative rail of the breadboard and did the same for the 5V pin by connecting it to the positive rail.

And Then, I connected the servo’s ground and power to the Arduino’s rails and plugged its signal wire into digital pin 10. Setting it up myself really helped me see how the Arduino powers and controls each part of the project.

And finally, I connected the Buzzer's ground to the Arduino’s ground and plugged its positive wire into pin 11. I also added a push button to activate/deactivate the circuit.

Next, I connected the keypad's lign to digital pin 2 to 9. Setting it up myself helped me understand how the Arduino reads data from lign to control the project.

Thirdly, I added LCD, Connected the power and ground in the breadboard, Data (SDA) to analog pin A4 and Clock (SCl) to analog pin A5.

Development/Implementation Process

Explain the development/implementation process of your assignment. How did you use the machine/tool to manufacture or implement the design of your assignment?

The circuit Process

Step 1: Preparing the components needed, Here is the list of all the electronic components I will need.

Step 2: Connect the positive and negative wires from the Arduino to the breadboard to set up the power rails.

Step 3: Connect the keypad's lign to digital pin 3 to 9. Setting it up myself helped me understand how the Arduino reads data from lign to control the project.

Step 4: Connect the servo motor’s positive and negative wires to the breadboard power rails, and attach its output pin to digital pin D8 on the Arduino

Step 5: Connect the LCD's positive and negative wires to the breadboard power rails, and attach its Data and Clock pin to analog pin A4 and A5 on the Arduino

Step 6: Uploading the code into Arduino Uno

Final look

vv.mp4

fdd.mp4

First I started by defining the libraries that I would need in the code, which are a library for the LCD, keypad and servo. I defined a variable and put the values of the keypad in it, then I wrote some defined strings to use some codes from the keypad library, then I defined a variable to store the password and defined another to verify that the password was entered by the user, I defined another variable called angle that I would use for the servo motor, and defined another variable for time (I got some help from Google of course) :) for this particular variable

As for the set-up, I defined the servo pin, and the button and the buzzer , and I made the servo at an angle of 0.

Inside the void loop(), the program keeps checking if someone presses a key on the keypad. If nothing is pressed, it waits. In normal mode, pressing # makes the program check the entered password, while pressing * switches to password change mode. If a number is pressed, it gets added to the input, and the LCD shows stars to hide the real digits. After each key press, the loop repeats, always ready for the next input. This setup lets the system run smoothly and respond right away to what the user does. If the input is correct, matches the password, the servo motor rotate 90 degree or Otherwise it doesn't rotate, satyed in 0 degree until it enters the correct password.

Community of Learning

Did you ask for feedback? What are the ideas that others have contributed or suggested? What was someone else’s idea that you built upon? How did you help your peers? How did your peers help you?

I spent three hours programming my LCD with Arduino while developing my own game. My friend Ali send me a link website to lean about coding LCD. This task challenged my problem-solving skills and tested my patience. I learned a lot about coding, debugging, and working with hardware. Overall, it was a valuable experience that improved my confidence and understanding of Arduino projects.

Overcoming Challenges

When you got stuck, what/who did you turn to? At what point did you have to pause to research or learn more before moving on? What are some mistakes, pitfalls, or challenges that others can avoid if they were doing this assignment?

I watched in a video where mine only had 3, but the keypad had 4 columns. That variation created programming my keypad hard. I struggled a lot. I eventually had to adjust my code for the keypad, costing extra time and effort. I better understood just how different keypad layouts may change the program at the end.

Final Project

How can you use the skills and knowledge that you've acquired this week in your final project?

Learning how to program components with Arduino gave me a stronger understanding of how each part works together, which I can use in my final project.

Writing code for the sensors(servo motor, LCD, Keypad) project showed me how programming can bring movement and life to a design.

WOW!

What is the coolest thing that you've learned this week? What is something that you will never forget from this week?

This week felt really special compared to the others. I worked on something I never imagined I could do. It reminded me of the smart planter populars and motion sensors I’ve only seen in malls or on TV

Weekly Digest [OPTIONAL]

Tell us about any other cool things that you've made this week: in the Hands-on activity, tutorial examples, exercises, or any other cool mini-project that you tried out aside from the assignment.

Discovering new components useful as LCD, photoresitor, servo motor

Assignment Design Files