Another simple example is to hook up a speaker to your Arduino.
Schematic
Layout
Code
A simple example.
int pin = 8; int note = 988; void setup() { } void loop() { //3 dots for the S for (int i=0; i<3; i++) { tone(pin, note, 100); delay(200); noTone(pin); } delay(200); //3 dashes for the O for (int i=0; i<3; i++) { tone(pin, note, 300); delay(400); noTone(pin); } delay(200); //3 dots for the S again for (int i=0; i<3; i++) { tone(pin, note, 100); delay(200); noTone(pin); } delay(200); //wait 3 seconds delay(3000); }
Parts List
Amount Part Type 1 Arduino Uno (Rev3) 1 100 Ω Resistor 1 Loudspeaker