Real-Time Clock (RTC) on Arduino UNO R4 Minima

This video tutorial explains how to use the internal real-time clock (RTC) on an Arduino Uno R4 Minima to display the current date and time on an LCD screen. It covers the setup of the RTC and LCD libraries, setting the initial time and date, and using the loop function to display time. The tutorial also discusses controlling events based on time and the limitations of the R4 Minima's RTC, such as the lack of battery backup. The video concludes with a summary of key points and considerations for using the RTC effectively.

What is a key advantage of the Arduino Uno R4 Minima over the R3?

• It has a built-in real-time clock.

• It has a built-in battery backup.

• It has a larger memory capacity.

• It supports wireless connectivity.

What is a limitation of the R4 Minima's real-time clock?

• It cannot display time on an LCD.

• It does not have a battery backup.

• It is not compatible with external modules.

• It cannot be used with LEDs.

Which libraries are necessary for using the real-time clock with an LCD on the R4 Minima?

• Liquid Crystal and RTC

• Wire and SPI

• Servo and EEPROM

• WiFi and Ethernet

What must be manually adjusted each time new code is uploaded to the Arduino?

• The LED pin modes

• The power settings

• The LCD screen size

• The initial time and date

Why is it important to measure the upload time when setting exact seconds?

• To avoid resetting the Arduino

• To accurately set the initial time

• To prevent code compilation errors

• To ensure the Arduino does not overheat

How is the date formatted on the LCD screen by default?

• Year/Day/Month

• Day/Month/Year

• Year/Month/Day

• Month/Day/Year

What is the default time format displayed on the LCD?

• 12-hour format

• AM/PM format

• Military time format

• 24-hour format

What is a method to ensure an event only triggers once per day?

• Restart the Arduino

• Set a flag variable

• Use a delay of one minute

• Use a different loop function

What happens if the loop function runs without a delay?

• The event may trigger multiple times

• The LCD will not display correctly

• The Arduino will shut down

• The LEDs will not turn on

How can you modify the time display to show AM/PM?

• Use a different Arduino model

• Add a new library

• Change the LCD screen

• Subtract 12 from the hour variable