INFRARED RECEIVER

What does an IR receiver do in an Arduino circuit?

• Emits infrared signals
  
  
  

• Detects infrared signals from a remote control

• Converts sound waves into electrical signals

• Generates radio frequency waves

Which Arduino library is commonly used to decode IR signals?

• Servo.h

• Wire.h

• IRremote.h

• SPI.h

What happens when an IR receiver detects a signal?

• It generates an analog voltage

• It blocks all electrical signals

• It powers off the Arduino

• This sensor detects

  the incoming modulated

  infrared light and converts

  it into an electrical signal

How many pins does a typical IR receiver module have?

• 3

• 2

• 5

• 1

What are the three main pins found on most IR receiver modules?

• TX, RX, GND

• PWM, VCC, GND

• VCC, GND, OUT

• SDA, SCL, GND

If an IR receiver is not working properly, which connection should you check first?

• OUT pin connection

• Whether VCC is connected to 5V or 3.3V

• GND connection

• All of the above

What voltage is typically supplied to the VCC pin of an IR receiver?

• 1V

• 3.3V or 5V

• -3V

• -5V

An IR LED emits visible red light.

• True
• False

The IR receiver can work without any external power source.

• True
• False

A student wants to turn on an LED when a specific button on the remote is pressed. Which additional code should they add inside if (IrReceiver.decode())?

• if (value == 0x1FE48B7) digitalWrite(LED_BUILTIN, HIGH);

• digitalWrite(LED_BUILTIN, HIGH); delay(1000); digitalWrite(LED_BUILTIN, LOW);

• if (IrReceiver.resume()) digitalWrite(LED_BUILTIN, HIGH);

• digitalWrite(LED_BUILTIN, HIGH);