Creating sound
Sound is a very powerful output that is usually taken for granted. We see things such as LEDs, we feel things such as motors, but we also hear. Arduino has a nice little library called Tone that aids in generating sounds at specific frequencies. For people passionate about music, we can actually play monophonic songs for the most geekish sound possible.
Getting ready
Following are the ingredients required to execute this recipe:
An Arduino board connected to a computer via USB.
A small 8-ohm speaker.
A 120-ohm resistor; larger values also work, but the sound will be less powerful. Don't use resistors under 100 ohms.
How to do it…
Follow these steps to connect a speaker to the Arduino:
Connect one terminal of the speaker directly into the GND of the Arduino.
Using a 120-ohm resistor in series, connect the other terminal to an available digital pin; in this example, pin 12.
Schematic
This is one possible implementation on the 13th digital pin. Other digital pins can also be used.
Here is...
