project 7.1

Project Overview

This project introduces a Smart Rhythm-Based Access System that replaces traditional keyholes with a movement-sensitive interface. Using an ultrasonic sensor for presence detection, the lock grants entry only when a specific, pre-programmed rhythmic pattern is entered via two tactile buttons.

Componemts

Arduino UNO
Breadboard
Ultrasonic
LCD
I2C
Servo motor
Buzzer
2 buttons
2 leds
2 resistors (220ohm)
Jumbers (M/M - M/F)

Step 1

connect the LCD with I2C and connect the M/F jumpers with I2C and Ultrasonic and M/M jumpers with servo

Step 2

connect the - of the led with 220ohm resistor to ground and the + with pin 4 of the arduino, redo with another led and connect it to pin 5, connect a button led to ground and the other leg to pin 2

Step 3

redo the button circuit and connect it to pin 3, add a buzzer connect the - leg to the ground and the + to pin 12

Step 4

connect the I2C to A4 and A5 pins, connect servo to pin 11 and ultrasonic to pin 9 and 10, connect the 5v and Ground of the Arduino to the common ground and VCC of the breadboard

Code section

Arduino code

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