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Coding for Beginners, Mini Projects / Microprojects, STEM & Brain Challenges

How To Use Tinkercad Vol 3

In this course, you'll build a digital password door lock system using Arduino. You'll understand how to keypad, I2C LCD ... Show more
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Instructor
Aniq Qusyairi
3 Students enrolled
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Course details
Duration : 2 Hours
Lectures : 2
Quizzes : 1
Level : Intermediate
  • Description
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Learn how to create a secure Arduino-based pasword door lock system using a 4×4 keypad and I2c LCD. This course is ideal for intermediate and educators wanting to explore hands-on electronics, coding and real world application of embedded systems. You’ll simulate and test your projectusing Tinkercad, an online Arduino simulator-no physical components required!

Do I need real Arduino hardware to complete this project?
No. You can complete the entire project using the Tinkercad Simulator, which is free and browser based. However, the project can also be built with real hardware if you prefer hand on practice.
Can i use a 3x4 keypad instead of a 4x4 keypad?
Ye, but you will need to modify the code to accommodate the different layout and fewer keys.
What happen if I enter the wrong password?
The system will display "Access Denied" on the LCD and reset the password input buffer for another attempt.
Can I change the default password in the code?
Yes. The default password (e.g. "1234") is hardcoded. You can change it directly in the Arduino sketch by editing the "correctPassword" variable.
What if the LCD screen shows nothing?
-Check the I2C address in your code.
-Ensure power connection are correct.
-Use potentiometer or adjust LCD contrast if using physical hardware.
Is this project suitable for school students?
Definitely! This is a beginner friendly project ideal for STEM programs, robotics clubs or secondary school students interested in electronics and coding.
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Basic info

Course Title: Password Door Lock with Arduino using Keypad and I2C LCD.
Level: Intermediate
Platform: Tinkercad (Simulation-based)
Project Type: Hands-on Simulation + Arduino Coding
Duration: 2 Hours
Language: English
Software Used: Tinkercad, Arduino IDE

Course requirements

You'll need basic understanding of:
-Arduino board and pin functions.
-Reading circuits and schematics.
-Arduino IDE (uploading and editing code).
-Using a browser (for Tinkercad simulation).

Optional but helpful:
-Familiarity wit C/C++ syntax.
-Prior use of breadboards and electronics components.

Intended audience

This course is designed for:
-Students learning Arduino, electronics or programming.
-STEM educators looking for simulation-based ativities.
-Maker and hobbyists interested in home automation and security.
-Beginners who want a hands-on but east to follow Arduino project.
-Anyone looking to build and simulate an Arduino password protected system without buying physical pasrts.

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Password door lock Arduino project | Using Tinkercad

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