Ultrasonic Distance Sensor Quiz

What is the main difference between the HC SR04 and the Ping ultrasonic distance sensors?

• The size of the sensor

• The number of pins

• The color of the sensor

• The material of the sensor

How many pins does the HC SR04 ultrasonic distance sensor have?

• Two

• Three

• Five

• Four

Which of the pins will need to be an INPUT pin and which one is and OUTPUT pin in Arduinoi

• TRIG is input

  ECHO is output

• TRIG is output

  ECHO is input

• VCC is input

  GND is output

• VCC is output

  ECHO is input

What is the principle used by the HC SR04 distance sensor to measure distance?

• Infrared light

• Radio waves

• Ultrasonic sound

• Visible light

Which pins on the ultrasonic sensor sends out a signal?

• VCC

• GND

• TRIG

• ECHO

What pin is used to measure the return of the sound on your ultrasonic sensor

• VCC

• GND

• ECHO

• TRIG

What is the speed of sound in air used for in the HC sro4 ultrasonic distance sensor?

• To emit ultrasonic sound

• To measure the return pulse

• To power the sensor

• To calculate distance

What is the expected duration of the trigger pulse for the HC sro4 ultrasonic distance sensor?

• 5 microseconds

• 10 microseconds

• 15 microseconds

• 20 microseconds

What modification is needed in the Arduino example program for the Ping sensor to use the HC sro4 sensor?

• Change the power source

• Declare separate variables for trigger and return pins

• Change the sensor's color

• Use a different Arduino board

What is a potential drawback of the HC sro4 sensor compared to the Ping sensor?

• Lack of availability

• Higher cost

• Limited compatibility with Arduino

• Inconsistent performance for smaller objects