Quiz on Ultrasonic Sensor with LCD

What is the function of an Ultrasonic Sensor?

• Record video

• Detect color

• Measure distance

• Play music

What is the configuration pin of the HC-SR04 Ultrasonic Sensor?

• VCC, TRIG, ECHO, GND

• IN1, IN2, OUT, GND

• SCL, SDA, VCC, GND

• TX, RX, GND, VCC

How does the Ultrasonic Sensor determine the distance of an object?

• Using SONAR

• Using GPS

• Using WiFi

• Using Bluetooth

What is the speed of sound used in the calculations for distance measurement?

• 200 m/s

• 1000 m/s

• 500 m/s

• 340 m/s

What is the purpose of the 220 Ω Resistor in the circuit?

• To amplify sound

• To decrease resistance

• To increase voltage

• To limit current

Which pin of the LCD is connected to the negative rail?

• Led cathode

• Enable pin

• Power pin

• Register select pin

What is the function of the potentiometer in the circuit?

• Adjust contrast of LCD

• Control temperature

• Change frequency of sound waves

• Increase brightness of LED

What is the purpose of setting the Trigger Pin on a High State for 10 µs?

• Generate infrared waves

• Generate ultrasound

• Generate radio waves

• Generate magnetic waves

What function is used to read the travel time from the Ultrasonic Sensor?

• digitalWrite()

• analogRead()

• delay()

• pulseIn()

How is the distance calculated using the travel time?

• Multiply by 0.0343 and divide by 2

• Add 10 and subtract 5

• Divide by 100 and add 50

• Multiply by 2 and subtract 1