Page 27 - Demo

Expected Output / Learning Outcome Students can turn motor ON/OFF with a button. Speed changes in steps (like gears). Students learn:%u2022 Using motor driver IC for safe control.%u2022 Applying PWM for speed control.%u2022 Combining input + motor output. Practice Questions %u2013 Project 7 Multiple Choice Questions (MCQs)Q1. Why do we need an L293D motor driver?a) To reduce motor sizeb) To supply enough current & protect Arduinoc) To make motor blink like LEDd) To slow down ArduinoAnswer: b) To supply enough current & protect ArduinoQ2. Which Arduino function is used to control motor speed?a) digitalRead()b) digitalWrite()c) analogWrite()d) pinMode()Answer: c) analogWrite()Q3. What happens when motorSpeed exceeds 255?a) Motor burns outb) Motor resets to 0 (OFF)c) Motor rotates faster than maxd) Nothing changesAnswer: b) Motor resets to 0 (OFF)Q4. The motor is powered using:a) Arduino 5V pin onlyb) External supply via L293D Vcc2c) USB cable onlyd) Resistor from ArduinoAnswer: b) External supply via L293D Vcc2 Fill in the Blanks