Test your knowledge- Adruino

Which command is called repetitively over and over again as long as the Arduino has power.

• forever

• repeat

• read

• set

What does the Wait Block wait for before setting digital pin 3 output as low?

• The Ultrasonic Sensor to detect an object

• The Ultrasonic Sensor to detect an object more than 50 cm away

• The distance to be set to 0 cm

• The Ultrasonic Sensor's reading to change by up to 0 cm

Using the Arduino code below, what will happen to the green LED light if the distance in cm value is 60?

• LED Light will turn OFF

• LED Light will turn ON

• LED Light intensity will change

• LED Light will turn ON and then OFF

Ultrasonic waves are a form of _______ waves

• sound

• ocean

• radio

• seismic

Where do we connect the Echo?

• Digital pin

• Analog pin

• 5V

• GND

What type of signals does a HC-SR04 sensor use?

• ultrasonic waves

• microwave

• digital

• radio waves

What HC-SR04 pin is used to transmit signals?

• VCC

• GND

• Trig

• Echo

What pin is used to receive signals?

• VCC

• GND

• Trig

• Echo

Finding the image of Ultrasonic Sensor

• 
• 
• 
• All of them

What is Ultrasonic Sensor used for ?

• recognize objects

• avoid obstacles

• measure distances

• All of them