Meta Title: How to Make a Smart Periodic Table Model Using Arduino, ESP32, LEDs and IoT

Meta Description: Learn how to make a Smart Periodic Table Model using Arduino and ESP32. Includes circuit diagrams, components, block diagrams, working principles, flowcharts, and real project apply

The periodic table is one of the most important tools in chemistry education. However, traditional printed periodic tables are static and often make learning difficult for students.

A Smart Periodic Table Model transforms chemistry learning into an interactive experience. When a student touches an element, the system automatically displays its properties, illuminates LEDs, plays voice explanations, and can even send information to a mobile application.

This project combines Chemistry, ICT, Artificial Intelligence, Engineering, and IoT technologies, making it an excellent project .

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Quick Answer: Smart Periodic Table Wiring Diagram

Component	Pin	Arduino Mega
TTP223 Touch Sensors	Signal	Digital Pins
OLED Display SDA	SDA	Pin 20
OLED Display SCL	SCL	Pin 21
DFPlayer Mini TX	TX	Pin 10
DFPlayer Mini RX	RX	Pin 11
RGB LEDs	Signal	PWM Pins
ESP32 Module	TX/RX	Serial Port

System Workflow

Student Touches Element → Sensor Detects → Arduino Processes → LCD Displays Information → LED Illuminates → Voice Output → Mobile App Update

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4

Why Build a Smart Periodic Table Model?

Students often face challenges in:

• Memorizing elements
• Understanding periodic trends
• Learning element uses
• Connecting chemistry concepts to real life

This project helps students learn chemistry interactively.

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Objectives of the Project

1. Make chemistry learning interactive.
2. Display information automatically.
3. Improve understanding of periodic trends.
4. Integrate chemistry with ICT and engineering.
5. Promote STEM education.

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Bill of Materials (BOM)

Component	Quantity	Purpose
Arduino Mega	1	Main controller
ESP32 Module	1	IoT connectivity
RGB LEDs	118	Element indication
Touch Sensors	118	User input
OLED Display	1	Display information
DFPlayer Mini	1	Voice output
Speaker	1	Audio explanations
Push Buttons	5	Control functions
Acrylic Sheet	1	Model construction
Rechargeable Battery	1	Power supply
Jumper Wires	Many	Connections

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Estimated Cost

Item	Approximate Cost
Arduino Mega	$12
ESP32	$8
LEDs	$10
Sensors	$15
Display	$5
Miscellaneous	$20

Estimated Total Cost: $60–70

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Components Overview

4

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Key Features

✅ Touch-sensitive periodic table

✅ Automatic display of properties

✅ Voice explanations

✅ LED illumination

✅ Quiz mode

✅ Mobile application integration

✅ AI chemistry tutor

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Model Design

The model consists of:

Upper Section

• Printed periodic table
• Embedded LEDs
• Touch sensors

Middle Section

• OLED display
• Speaker
• Control buttons

Lower Section

• Arduino Mega
• ESP32
• Battery system

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4

Block Diagram

Touch Sensors
       ↓
Arduino Mega
       ↓
OLED Display
       ↓
Voice Module
       ↓
RGB LEDs
       ↓
ESP32 IoT Dashboard

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Circuit Connections

OLED Display

• SDA → Pin 20
• SCL → Pin 21

DFPlayer Mini

• TX → Pin 10
• RX → Pin 11

LEDs

Connect through multiplexers or shift registers.

Touch Sensors

Each element has one sensor input.

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Step-by-Step Guide: How to Make a Smart Periodic Table Model

Step 1: Construct the Board

Use:

• Acrylic sheet
• Wooden board
• PVC board

Print and mount the periodic table.

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Step 2: Install LEDs

Place LEDs under each element.

Use different colours for classifications.

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Step 3: Install Touch Sensors

Attach sensors beneath each element.

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Step 4: Connect Electronics

Install:

• Arduino
• ESP32
• Display
• Speaker
• Battery

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Step 5: Upload Program

The program should:

• Identify selected element.
• Display information.
• Activate voice output.
• Illuminate LEDs.

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Working Principle

When a student touches an element:

Example:

Student touches Oxygen (O)

The system performs the following:

1. Detects touch input.
2. Arduino identifies Oxygen.
3. OLED displays properties.
4. LED illuminates.
5. Speaker provides explanation.
6. Mobile app receives information.

Example display:

Element: Oxygen
Atomic Number: 8
Atomic Mass: 15.999
Group: 16
Uses:
Respiration
Medical oxygen
Steel manufacturing

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System Flowchart

START
    ↓
Wait for User Input
    ↓
Element Selected?
    ↓
YES
    ↓
Display Properties
    ↓
Illuminate LEDs
    ↓
Activate Voice Output
    ↓
Send Information to App
    ↓
Repeat

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4

Innovative Features

1. Quiz Mode

Example:

Find the element with atomic number 17.

Student selects:

Chlorine

System awards marks.

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2. Periodic Trends Visualization

Display:

• Atomic radius
• Electronegativity
• Ionization energy

using LED animations.

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3. Voice Assistant

Students ask:

Tell me about Carbon.

System explains automatically.

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4. AI Chemistry Tutor

Can answer:

• Why is Sodium reactive?
• Why are noble gases stable?

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5. IoT Dashboard

Students can remotely access:

• Element properties
• Quizzes
• Learning statistics

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Applications

This project can be used in:

• Schools
• Universities
• Museums
• Science centres
• STEM laboratories
• Smart classrooms

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Advantages

✔ Interactive learning

✔ Improves understanding

✔ Attractive visual display

✔ Integrates chemistry and ICT

✔ Supports self-learning

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Limitations

• Large number of sensors required.
• Complex wiring.
• Higher cost than traditional models.

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Future Improvements

You can improve this project by adding:

Augmented Reality (AR)

Display 3D atomic structures.

Artificial Intelligence

Personalized chemistry tutoring.

Holographic Display

Project periodic trends in 3D.

Cloud Database

Store student learning records.

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How to Fix Common Arduino Upload Errors

Error: Arduino Not Uploading

Solutions

• Verify COM port.
• Replace USB cable.
• Install drivers.

Error: LEDs Not Working

Solutions

• Check polarity.
• Verify resistors.

Error: Display Not Showing Data

Solutions

• Verify SDA/SCL wiring.
• Check I2C address.

Error: Touch Sensors Not Responding

Solutions

• Check sensitivity settings.
• Verify connections.

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Real Project Prototype

Featured Images Required for Blog

1. Components Image

• Arduino Mega
• ESP32
• Touch Sensors
• RGB LEDs
• OLED Display
• DFPlayer Mini

2. Features Illustration

• Interactive learning
• Voice assistant
• Mobile app
• Quiz mode

3. Block Diagram

Sensors → Arduino → Display → Voice → IoT

4. Working Principle Diagram

Student Touch → Processing → Display → Voice

5. Circuit Diagram

Complete Arduino wiring layout.

6. Flowchart

System operation process.

7. Real Prototype Image

Fully assembled Smart Periodic Table Model.

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Final Thoughts

Learning how to make a Smart Periodic Table Model is one of the most innovative educational STEM projects.

By combining Chemistry, Arduino, ESP32, Artificial Intelligence, and IoT, students can transform the traditional periodic table into a modern interactive learning system.