Tutorial 07: digitalRead() and the Serial Port: Arduino Course for Absolute Beginners (ReM)

This tutorial covers the basics of using an Arduino to read digital signals, focusing on the digitalRead function and serial communication. It explains the setup of a simple circuit with a push button and resistor, and how to use the Arduino IDE to write and upload code. The tutorial also delves into the use of the serial library to establish communication between the Arduino and a computer, allowing users to monitor button states via the serial monitor.

What is the primary function of the digital read in Arduino?

• To write data to a pin

• To read the voltage level of a pin

• To initialize the Arduino board

• To set the baud rate for communication

Which component is NOT required for the circuit setup in this tutorial?

• LED

• Momentary push button

• Arduino board

• 10K resistor

What is the purpose of the 10K resistor in the circuit?

• To increase the current

• To limit the voltage

• To connect the button to the power supply

• To pull the pin to ground when the button is not pressed

In the Arduino IDE, what does the 'serial begin' function do?

• It sets the pin mode

• It initializes serial communication

• It uploads the code to the board

• It starts the Arduino board

What is the role of the 'pin mode' function in the setup?

• To set the pin as an input or output

• To delay the execution of the program

• To print data to the serial monitor

• To read the state of the pin

What does the digital read function return when the button is pressed?

• 10

• 5

• 1

• 0

How can you view the output of the Arduino program on your computer?

• By using the serial monitor

• By observing the circuit directly

• By checking the LED on the board

• By using a multimeter

What is the purpose of the 'delay' function in the loop?

• To reset the Arduino board

• To increase the speed of execution

• To stabilize readings between button presses

• To stop the program

What happens to the serial monitor output when the button is released?

• It stops displaying any output

• It shows a continuous stream of ones

• It shows a continuous stream of zeros

• It alternates between ones and zeros

What is the significance of the baud rate in serial communication?

• It sets the frequency of the Arduino

• It determines the voltage level

• It controls the power supply to the board

• It defines the speed of data transmission