
HC-SR04 Ultrasonic sensor
Quiz
•
Computers
•
9th - 10th Grade
•
Practice Problem
•
Hard
Regie Ocampo
Used 30+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of signals does a HC-SR04 sensor use?
ultrasonic waves
microwave
digital
radio waves
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What HC-SR04 pin is used to transmit signals?
VCC
GND
Trig
Echo
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What pin is used to receive signals?
VCC
GND
Trig
Echo
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What command is used to turn ON the HC-SR04 sensor?
digitalWrite(trigPin, HIGH);
analogWrite(trigPin, HIGH);
digitalWrite(trigPin, LOW);
analogWrite(trigPin, LOW);
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula to compute for the duration of time travelled by the signal from the sensor to the object?
distance = time * .034 / 2
time = distance/ .034
distance = speed * .034 /2
time = 0.034 /distance
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the command to initialize echoPin in void setup?
pinMode(echoPin,INPUT);
pinMode(echoPin,OUTPUT);
const int echoPin;
long echoPin;
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In what pin do we connect VCC?
GND
5V
Digital pin
Analog pin
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