Arduino for Beginners - 2022 Complete Course - Activity 04 - Solution

This tutorial explains how to control the brightness of an LED using a potentiometer on an Arduino. It covers setting up the pins, reading analog values, scaling them, and writing to the LED using PWM. The video also demonstrates compiling the code and testing the setup, showing how the LED brightness changes with the potentiometer's position.

What is the primary task described in the video tutorial?

• Adjusting the brightness of an LED using a potentiometer

• Controlling the speed of a motor using a potentiometer

• Measuring temperature with a sensor

• Creating a digital clock

Which pin is defined for the potentiometer in the setup?

• Pin 11

• Pin A0

• Pin 13

• Pin A2

What mode is the LED pin set to in the setup function?

• PWM

• Input

• Output

• Analog

What is the range of values returned by the analogRead function?

• 0 to 1023

• 0 to 255

• 0 to 4095

• 0 to 65535

How is the potentiometer value scaled for the LED brightness?

• Multiplied by 4

• Divided by 2

• Divided by 4

• Multiplied by 2

What function is used to write the scaled value to the LED?

• serialWrite

• analogWrite

• digitalWrite

• pwmWrite

What should you do if there is an error during code compilation?

• Fix the error and try compiling again

• Ignore the error and upload the code

• Restart the computer

• Change the microcontroller