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Decide whether a machine counts as a robot by looking for three jobs: sensing something, choosing an action, and making physical motion. Use everyday examples to separate robots from simple tools, appliances, and remote-controlled machines.
Use what you learned in the previous lesson to solve real-world problems.
Mark the boundary between the robot, the world around it, and the task it is trying to affect. Reason about how a robot changes the environment, then senses the result of that change.
Check what you understood with a short quiz.
Trace how a sensor turns light, distance, touch, sound, or motion into data the controller can use. Recognize that sensor readings are signals, not perfect copies of reality.
Follow how a controller uses sensor readings, stored instructions, and a goal to choose the next command. Compare a simple rule like “if too close, back up” with a robot that stores state from earlier moments.
Trace how a command becomes motion through a motor, driver, or other actuator. Distinguish the low-power information signal that says what to do from the higher-power energy that actually moves the robot.
Compare a one-shot action with a feedback loop that checks what happened and corrects the next action. Use examples like line following or wall avoiding to see why robots keep sensing while they move.
Follow two different paths through a robot: information flowing from sensors to controller to actuator commands, and energy flowing from the battery or power supply to the moving parts. Keep these paths separate even when they share wires or electronics.
Read a simple block diagram with sensors, controller, actuators, power source, body, and environment. Use arrow direction to say what each part sends, receives, or physically changes.
Trace a small mobile robot through one full cycle: detect an obstacle, decide to turn, power the motors, move, and sense the new situation. Connect each step to the sense-think-act model without needing detailed hardware vocabulary.
Review this chapter with practice based on your mistakes.
