Morse code has been historically used for telecommunication before the advent of modern digital communication. Today, it remains a useful method for low-bandwidth communication or signaling in emergencies.
This project allows users to:
- Encode: Convert text input into Morse code signals (via LED blinking, buzzer sound, or digital output).
- Decode: Interpret Morse code input (via button presses, sound signals, or light detection) into readable text.
Key Features :
- Input via keypad, serial monitor, or buttons.
- Output via LED, buzzer, or display module.
- Bidirectional conversion between text and Morse code.
- Educational tool for understanding encoding/decoding principles.
The system combines microcontroller programming, input/output interfacing, and signal processing.
CIRCUIT DIAGRAM
Connection Description (Wiring Map) :
Main Components:
- Microcontroller: Arduino Uno / ESP32
- LED / Buzzer: Provides Morse code output
- Input Interface: Push button or serial input for Morse code or text
- LCD Display (Optional): Shows decoded or encoded text
Power Supply: 5V regulated supply
Wiring Summary :
Component | Arduino Pin | Connection Notes |
LED | D9 | Digital output for Morse code signal |
Buzzer | D8 | Optional sound output for Morse code |
Push Button | D2 | Input for Morse code signal |
LCD Display | D4-D7 | Optional; 16×2 LCD for text display |
Power Supply | Vin & GND | 5V regulated supply |
Visual Wiring Map (Simplified) :
- Push button connected to digital input pin (with pull-down resistor)
- LED and buzzer connected to digital output pins
- LCD display connected via parallel or I2C interface
- Arduino powered through 5V regulated supply
Testing the Hardware :
- LED/Buzzer Test: Write a simple Arduino program to blink LED or buzz a few dots and dashes to verify output.
- Button Input Test: Press the button and check if Arduino detects short and long presses for dot/dash input.
- Encoder Test: Input a text message (via serial or keypad) and verify LED/buzzer output represents correct Morse code.
- Decoder Test: Input Morse code (via button presses) and verify that the corresponding text is displayed on the LCD or serial monitor.
Integration Test: Combine encoder and decoder functions to ensure bidirectional conversion works correctly.
Applications :
Automatic Street Light Tracking – Moves toward light source for testing or maintenance models.
Solar Panel Cleaning Robot – Follows sunlight direction for better alignment.
Search & Rescue (Basic Model) – Detects light signals in dark areas.
Warehouse Guidance System – Follows light path for navigation.
Educational STEM Projects – Used to teach sensors, LDR, and robotics concepts.
Security & Surveillance Prototype – Tracks torch/light movement.
Energy Optimization Models – Demonstrates light-based automation systems.
Troubleshooting :
Problem | Possible Cause | Solution |
LED/Buzzer not working | Incorrect wiring or pin assignment | Check connections and output pin in code |
Button input not detected | Improper wiring or missing pull-down | Connect pull-down resistor and test |
Incorrect Morse code output | Timing of dot/dash not calibrated | Adjust delay times in Arduino code |
LCD display shows nothing | Wiring or initialization issue | Check data pins and LCD initialization |
Encoder and decoder not synced | Logic error in code | Debug Arduino program and verify lookup tables |
( Morse code is a method of encoding text characters as sequences of dots and dashes. A Morse Code Decoder and Encoder is an electronic system that can convert normal text into Morse code and vice versa. This project is useful for communication in emergency situations, educational purposes, or hobbyist electronics projects. Using microcontrollers, input/output interfaces, and optional sound or LED signals, it demonstrates the principles of digital encoding and decoding. )