Motor Control

What is the primary function of a microcontroller in motor control?

• To process input signal to control the motor

• To provide power to the motor

• To change the motor's direction

• To change the motor's speed

Which command in Arduino is used to write a digital value to a pin?

• analogWrite()

• digitalWrite()

• pinMode()

• digitalRead()

When controlling a motor’s speed using PWM, what does PWM stand for?

• Pulse Width Modulation

• Power Wattage Management

• Pulse Wave Modulator

• Power Workforce Mechanism

Which of the following is true about using PWM for motor speed control?

• It varies the motor’s speed by changing voltage.

• It can only turn the motor on or off, not control speed.

• It controls speed by adjusting the duration of the “on” signal.

• It increases motor speed by increasing the frequency of the signal.

If a program uses a sensor to adjust the motor’s speed based on the distance to an object, which sensor type is most suitable?

• Temperature sensor

• Ultrasonic distance sensor

• Humidity sensor

• Light sensor

Which timer mode in the ATmega328 is used to create PWM waveform?

• Normal Mode

• Clear Timer on Compare match Mode (CTC Mode)

• Fast PWM mode

• Modulate PWM mode

Which register in the ATmega328 is used to set the period for Fast PWM mode?

• TCCRnA

• OCRnA

• TCCRnB

• TCNTn

Which register in the ATmega328 is used to set the duty cycle for Fast PWM mode?

• TCCRnA

• OCRnA

• TCCRnB

• TCNTn

How does changing the value of OCRnA affect the output in Fast PWM mode

• It changes the PWM frequency.

• It changes the PWM duty cycle

• It turns of the PWM

• It reload the value in the timer register (TCNTn)

If a project requires a PWM signal with a specific duty cycle and frequency, which of the following factors must be considered when configuring the ATmega328’s Fast PWM mode?

• The voltage level of the power supply.

• The prescaler value and the OCRnA register value.

• The type of motor being controlled.

• The programming language used to write the firmware.