Lesson 2: Robot Components: Sensors, Actuators, and Controllers

Learning Objectives Identify the three main components of a robot: sensors, actuators, and controllers. Define the function of a sensor, an actuator, and a controller in a robotic system. Differentiate between a sensor (input) and an actuator (output). Provide at least two real-world examples for each type of component (sensor, actuator, controller). Explain how the controller uses data from sensors to command actuators. Write a simple pseudocode program that demonstrates the relationship between a sensor, a controller, and an actuator. Ever wonder how a robot vacuum avoids bumping into walls or how a self-driving car knows when to stop? 🤖 It's all about its 'senses' and 'muscles'! In this lesson, we'll explore the three core parts of any robo...

TermDefinitionExample SensorA device that detects and responds to some type of input from the physical environment. It's how a robot 'senses' the world.An ultrasonic sensor on a robot car that measures distance to a wall. ActuatorA component of a machine that is responsible for moving and controlling a mechanism or system. It's how a robot 'acts' or 'moves'.An electric motor that spins the wheels of a robot. ControllerThe 'brain' of the robot that processes information from sensors and sends commands to the actuators.A microcontroller like an Arduino or a Raspberry Pi that runs the robot's code. InputData or signals received by the controller, usually from a sensor.A light sensor sending a value of '100' (representing bright...

The Sense-Think-Act Cycle Input (Sensor) -> Process (Controller) -> Output (Actuator) This is the fundamental loop of all autonomous robots. The robot senses its environment, the controller thinks or makes a decision based on the sensor data, and then it acts on that decision using its actuators. Conditional Logic (If-Then) IF (sensor condition is met) THEN (perform actuator action) This is the most common way a controller makes decisions. It uses an 'if' statement to check the data from a sensor and then executes a command for an actuator if the condition is true. Function for an Action function move_forward() { set_motor_speed(left_wheel, 100); set_motor_speed(right_wheel, 100); } Grouping actuator commands into functions makes code easier to read a...