Arduino for Beginners - 2022 Complete Course - Activity 20 - Solution

The video tutorial explains how to sample data from a photoresistor sensor, compute the average of the readings, and print the results. It covers initializing variables, setting up the sensor, reading and storing data in an array, and calculating the average using a function. The tutorial also demonstrates how to print the average and additional information to the serial monitor. The code serves as a template for measuring the average of any sensor, highlighting its potential applications.

What is the purpose of taking multiple samples from the photoresistor sensor?

• To increase the sensor's sensitivity

• To compute an average value over time

• To reduce the sensor's power consumption

• To calibrate the sensor automatically

Which variable type is used to store the last time a sensor reading was taken?

• int

• double

• unsigned long

• float

Why is an array used to store sensor data samples?

• To increase data transmission speed

• To store multiple values for averaging

• To perform real-time data analysis

• To reduce memory usage

What is the purpose of the index counter in the array?

• To track the number of sensors

• To reset the sensor readings

• To manage the position for storing data

• To calculate the average directly

What data type is used for the sum variable in the average computation function?

• long

• unsigned long

• float

• int

Why is the sum variable initialized to zero in the average computation function?

• To increase computation speed

• To reduce memory usage

• To ensure accurate summation

• To prevent overflow

What is the purpose of the print average function?

• To display the sensor's raw data

• To reset the sensor readings

• To calibrate the sensor

• To print the average with additional information

How does the program indicate the progression of data collection?

• By printing a star

• By displaying a progress bar

• By flashing an LED

• By printing a dot

What happens when the index counter reaches the array size?

• The sensor is recalibrated

• The array size increases

• The counter resets to zero

• The program stops collecting data

What is the main advantage of using this code template for sensors?

• It increases sensor accuracy

• It provides a reusable structure for averaging

• It reduces sensor power consumption

• It automatically calibrates the sensor