The Complete Beginners Guide to Arduino - 2021 - Making Sound with a Piezo

This video tutorial covers the use of Arduino tone commands to create sounds with piezo sounders. It explains the setup of a simple circuit and demonstrates how to use the tone command to produce different frequencies and durations. The tutorial also explores creating alarm sounds using loops and frequency changes, and generating random sounds with the random command and analog read. Key concepts include the difference between piezo sounders and buzzers, the importance of delays in sound generation, and the use of random seed for true randomness.

What is the main difference between a piezo sounder and a piezo buzzer?

• Piezo sounders can change frequency, buzzers cannot.

• Piezo buzzers are louder than sounders.

• Piezo sounders are used for lighting.

• Piezo buzzers are more expensive.

When using the tone command, what is automatically set by the command?

• The pin as an input

• The pin as an output

• The frequency to 1000 Hz

• The duration to 1 second

Why is it important to include a delay after the tone command?

• To ensure the duration parameter works

• To allow the sound to be heard

• To save power

• To prevent the Arduino from overheating

What does the noTone command do?

• Increases the volume

• Stops the sound on a specific pin

• Starts a new tone

• Changes the frequency

How can you create an alarm sound using Arduino?

• By using a single frequency continuously

• By sweeping frequencies up and down

• By using the noTone command

• By connecting multiple buzzers

What is a pseudo-random number?

• A number that is completely random

• A number that follows a predictable sequence

• A number that is always zero

• A number that is generated by a sensor

What is the purpose of the randomSeed command?

• To start the random number sequence at a different point

• To reset the Arduino

• To increase the speed of the Arduino

• To generate a fixed number

How can you achieve more randomness in Arduino?

• By using multiple tone commands

• By using a piezo buzzer

• By using a longer delay

• By using the analogRead command

What range of values can the analogRead command return?

• 0 to 4095

• 0 to 65535

• 0 to 1023

• 0 to 255

What is the maximum voltage that can be read by an Arduino analog pin?

• 5 volts

• 12 volts

• 24 volts

• 3.3 volts