Crafting a Password Lock Project: An Arduino Simulation

Introduction

In this tutorial, we will create an interactive password generator and unlock system using an Arduino UNO. The system will randomly generate a password, and when a user presses the corresponding switch, the Arduino will check if the input matches the preset password. If the input is correct, the system will display the password on a seven-segment display and light up an LED to indicate a successful unlock. After each successful entry, the password will be regenerated for the next attempt.

Components Needed

• Arduino UNO
• 1 x Seven-segment display
• 1 x LED
• 1 x 220-ohm resistor (for the LED)
• 1 x Push button switch
• 1 x 10k-ohm resistor (for the push button)
• Breadboard and jumper wires
• Arduino IDE (for programming)

Circuit Diagram

Libraries and Variables: We include the SevSeg library for controlling the seven-segment display. We define pins for the button and LED, as well as variables for the password and user input.

Setup Function: In the setup function, we initialize the button pin, LED pin, and seven-segment display. We also generate the initial password.

Loop Function: The loop function continuously checks if the button is pressed. If it is, it calls the checkPassword function. The current password is displayed on the seven-segment display.

Generate Password Function: This function generates a random password between 0 and 9.

Check Password Function: This function compares the entered number with the generated password. If they match, it turns on the LED for one second and regenerates the password.

Online Simulation Test

Simulate online: https://www.pcbx.com/community-detail/c21ca87ecd3f436b92c4049127db8109

Conclusion

Successfully built an interactive password generator and unlock system using Arduino. You can expand this project by adding more features, such as multiple buttons for different passwords, a more complex password system, or even a buzzer for incorrect attempts. Experiment and have fun with your new project!

If you have any questions or need further assistance, feel free to ask!

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