9 Arduino Uno Digital Scale using Block Coding Tinkercad

Описание: 📏 Ultrasonic Sensor + I2C LCD – Arduino Uno with Block Coding on Tinkercad | Distance Display System

🔰 1) Introduction:
In this interactive project, we use an Ultrasonic Sensor (HC-SR04) to measure distance and display it on a 16x2 I2C LCD screen using an Arduino Uno. The project is built and simulated using Tinkercad Circuits, with both Block Code and C++ code options. It introduces basic sensor interfacing and I2C communication.

💡 2) Explanation:
The HC-SR04 ultrasonic sensor uses sound waves to measure distance by calculating the time it takes for an echo to return.

Short distance = fast echo = lower duration value

Long distance = slow echo = higher duration value

In this project:

We use digital pin 2 (TRIG) and pin 3 (ECHO) for the ultrasonic sensor

We read the travel time of the sound pulse

We convert that time into distance in centimeters

The distance is then displayed on the I2C LCD screen in real time

🔧 3) Components Used:

Arduino Uno

HC-SR04 Ultrasonic Sensor

16x2 LCD Display with I2C Module

Breadboard and Jumper Wires

Tinkercad Circuits (for simulation)

🧩 4) Circuit Connections:

Ultrasonic Sensor (HC-SR04):

VCC → 5V

GND → GND

TRIG → Pin 2

ECHO → Pin 3

I2C LCD Display:

VCC → 5V

GND → GND

SDA → SDA (A4) on Arduino Uno

SCL → SCL (A5) on Arduino Uno

📟 Working:

The Arduino sends a 10-microsecond pulse to the TRIG pin

The ECHO pin measures the time it takes for the echo to return

This time is converted into distance using the formula

The calculated distance is printed on the I2C LCD screen

You can also see the distance in real-time on the Serial Monitor (optional)