Arduino for Beginners - 2022 Complete Course - Activity 13 - Solution

The video tutorial explains how to make an LED fade in and out using a potentiometer and EEPROM. It covers setting up serial communication, validating data, writing to EEPROM, and handling potentiometer input to control LED brightness. The tutorial also discusses initializing the program with default values and ensuring data persistence across program runs.

What is the purpose of setting a cap value for the LED brightness?

• To ensure the LED does not exceed a safe brightness level

• To turn off the LED

• To make the LED blink

• To change the LED color

Why is it important to validate data received from the serial input?

• To ensure the data is within the expected range

• To make the program run faster

• To save memory

• To change the data type

What should you avoid when writing data to EEPROM?

• Using variables

• Reading from EEPROM

• Defining constants

• Writing at full speed

Why is it beneficial to use a defined constant for the EEPROM address?

• To change the data type

• To make the program run faster

• To easily change the address without affecting the program

• To save memory

What is the purpose of including the EEPROM library?

• To enable reading and writing to EEPROM

• To make the LED blink

• To change the LED color

• To turn off the LED

What is the role of the potentiometer in this setup?

• To save data to EEPROM

• To change the LED color

• To adjust the LED brightness

• To turn the LED on and off

How is the LED brightness value capped?

• By setting it to zero

• By multiplying it by two

• By dividing it by four

• By comparing it to a maximum brightness value

How is the LED brightness adjusted using the potentiometer?

• By reading the potentiometer value and dividing by 4

• By multiplying the potentiometer value by 2

• By adding 10 to the potentiometer value

• By subtracting 5 from the potentiometer value

What happens if the EEPROM read value is zero at program start?

• The potentiometer stops working

• The program crashes

• A default max brightness value is set

• The LED turns off

What is the initial value of max brightness if EEPROM has not been written to?

• 50

• 100

• 0

• 255