Adaptive LED Morse Code Decoder and Timer Interrupt - Arduino Project Hub
Task 2 - Investigate and Modify - Bruno Gagliardi Arduino Hacking
multiwingspan
Storing Morse code in C - A comparison of techniques - Embedded.com
GitHub - two-engineers2/Arduino-Morse-Code-with-LED-and-Buzzer: Step by step instructions with explanations to construct an LED and piezo buzzer circuit and program it to communicate SOS and other messages in morse code using Arduino.