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.
DRIVER GUARD: SOS SIGNAL WITH BUZZER + LED BLINKING AND MOTOR DECELERATION – SENSING THE CITY
Morse Code S.O.S. Flasher - Hackster.io
Arduino LED : 6 Steps - Instructables
DFRobot Arduino Starter Kit - SOS Morse Code LED (Project 2) - YouTube