Braille Keyboard with Audio Feedback

An Arduino-based Braille keyboard system that converts Braille input into audible speech output, designed to assist visually impaired users.

📋 Table of Contents

• Features
• Hardware Requirements
• Software Dependencies
• Circuit Diagram
• Installation
• Usage
• Contributors

✨ Features

• Dual input mode (Braille & numbers)
• Real-time audio feedback using text-to-speech
• Support for standard Braille character set
• Simple button-based input interface

🔧 Hardware Requirements

Component	Quantity	Purpose
Arduino Uno	1	Main microcontroller
Tactile Push Buttons	6	Braille dot input (dots 1-6)
SPDT Toggle Switch	1	Mode selection (Braille/Text)
3.5mm Audio Jack	1	Audio output
10kΩ Resistors	6	Button pull-down resistors
Breadboard	1	Circuit assembly
Jumper Wires	As needed	Connections
LED	7	Visual Output

📚 Software Dependencies

This project requires the following Arduino libraries:

• TMRpcm - Audio playback
• SD - SD card functionality
• Talkie - Text-to-speech
• Vocab_US_Large - Speech vocabulary
• Vocab_Special - Special characters
• Vocab_US_TI99 - Additional vocabulary

🔌 Circuit Diagram

⚙️ Installation

1. Clone this repository or download the source code
2. Install required libraries via Arduino Library Manager
3. Connect hardware components as per the circuit diagram
4. Upload Braille_Keyboard.ino to your Arduino Uno

🖥️ Usage

1. Power on the system
2. Toggle switch to select mode:
   • Braille Mode: Use buttons 1-6 to input Braille characters
   • Number Mode: Braille for numbers
3. System provides audio feedback for each input
4. Long press (configurable duration) to confirm input

👥 Contributors

• Raadmir - Software implementation & Braille logic
• Azat - Hardware design & circuit implementation
• Dastan ME implementation Design
• Sergali Create presentation

📖 Additional Resources

Project Presentation