Internet of Things (IoT) Practice Exam

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If we intend to include a servo motor as an actuator, what feature should we look for in a microcontroller?

  1. Analogue to Digital converter

  2. Digital to Analogue converter

  3. GPIO pins

  4. Pulse Width Modulation pin

The correct answer is: Pulse Width Modulation pin

When selecting a microcontroller for use with a servo motor, looking for a Pulse Width Modulation (PWM) pin is particularly important because servo motors are typically controlled through PWM signals. The position of the servo motor is determined by the width of the pulse sent to it, where different pulse widths correspond to different angles of rotation. This means that a microcontroller that can output PWM signals will allow for precise control of the servo's position. PWM pins on a microcontroller provide a method to create a varying signal that can modulate the pulse width, which is essential for adjusting the angular position of the servo. This feature facilitates the required control scheme for many applications involving servo motors, ranging from robotics to automation. Other features such as analogue to digital converters, digital to analogue converters, and GPIO pins, while useful in different contexts, do not directly relate to the specific control mechanism needed for servo motors.

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