Arduino Level 2

Which one in NOT the MAIN COLOR that this component can produce?

• Red

• Green

• Yellow

• Blue

Which one of the following Arduino UNO pin is NOT a PWM pin?

• pin 3

• pin 4

• pin 10

• pin 11

To fade an LED that is connected to a PWM pin, we use ___________ instead of digitalWrite.

Which one is the CORRECT connection of the I2C module of the LCD to the Arduino pins?

• GND to 3.3V

• VCC to SDA

• SDA to Analog 4

• SCL to Digital Pin 1

Besides <LiquidCrystal_I2C.h> library, which other library is needed to use a Liquid Crystal Display I2C?

• <Display.h>

• <RS3231.h>

• <Serial.h>

• <Wire.h>

lcd.setCursor(3,1) will display the characters on the LCD to....

• 3rd ROW, 1st COLUMN

• 3rd COLUMN, 1st ROW

• 4th ROW, 2nd COLUMN

• 4th COLUMN, 2nd ROW

In this code: LiquidCrystal_I2C lcd(0x3F,16,2); the value "0x3F" represents the...

• Time on the LCD

• Address of the I2C module

• Maximum row of the LCD

• Maximum characters the LCD can support

What is the use of the potentiometer on the I2C module of the LCD?

• To make text move faster

• Adjust the contrast of the screen

• Adjust the speed of data

• Adjust the volume

Two main reasons that the backlight of an LCD didn't turn ON (assuming the LCD light is not broken) :

• no lcd.backlight(); in void setup()

• Backlight jumper on the I2C module missing

• Wrong lcd.setCursor code

• No pinMode(lcd, OUTPUT) in void setup()

DS3231 is a Real Time Clock (RTC) module. Besides being used as Clock, it can be used to detect...

• Sound

• Temperature

• Distance

• Light