Robot Parts: Motors and Sensors

Learning Objectives Identify the difference between an actuator (like a motor) and a sensor. Explain the function of at least two types of motors (DC, Servo) and two types of sensors (Ultrasonic, Infrared). Write pseudocode to control the speed and direction of a motor. Write pseudocode to read and store a value from a sensor. Create a simple program that uses sensor data to make a decision and control a motor. Describe the relationship between a robot's physical components and the code that controls them. How does a self-driving car know when to stop, or a robot vacuum know not to fall down the stairs? 🤖 It's all about giving the robot 'muscles' to move and 'senses' to perceive the world! In this lesson, we'll explore the fundamental bui...

TermDefinitionExample ActuatorA component of a robot that is responsible for moving or controlling a mechanism. It takes an electrical signal and converts it into physical motion.A DC motor that spins a wheel is an actuator. It takes a 'go' signal from the computer and creates movement. SensorA component that detects events or changes in its environment and sends that information to the robot's computer. It gives the robot awareness of its surroundings.An ultrasonic sensor sends out sound waves to measure the distance to an object, acting like the robot's 'eyes'. DC MotorA simple motor that provides continuous rotation. Its speed and direction can be controlled, but not its exact position.Used for the wheels of a simple robot car, where you want them to keep...

Controlling an Actuator (Motor) motor.set_power(value) This is a common pattern for controlling a motor. You call a function associated with your motor object and pass a value. A positive value (e.g., 100) might mean full speed forward, a negative value (e.g., -100) full speed backward, and 0 means stop. Reading from a Sensor variable = sensor.read_distance() To use sensor data, you must first read it and store it in a variable. This pattern calls a function on the sensor object, which returns a value (like a distance in cm) that your program can then use. Sensor-Based Decision Making if sensor.read_distance() < 20: motor.set_power(0) This is the core of robotics: the Sense-Think-Act loop. The program 'senses' the environment (reads the sensor), &#03...