Arduino SOS Signal With 8ohms Speaker + LED Blinking : 3 Steps - Instructables
Arduino SOS Beacon : 4 Steps (with Pictures) - Instructables
Blinkenlights
Carte ARDUINO - « SOS »
Make a S.O.S signal using LED and Arduino - Hackster.io
SOS Signal With an Arduino : 4 Steps - Instructables
DRIVER GUARD: SOS SIGNAL WITH BUZZER + LED BLINKING AND MOTOR DECELERATION – SENSING THE CITY
Introduction to Arduino: Getting Connected and Blinking LEDs - Maker Challenge - TeachEngineering
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.