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Parts of a Robot
Frame, motors, sensors, controller, battery, and wiring
A robot is a machine that can sense, think, and act to complete a task. A wheeled classroom robot has parts that work together like a team, including a frame, motors, sensors, a battery, and a controller board. Learning the parts of a robot helps students understand how robots move, follow instructions, and interact with the world. These ideas are used in science labs, factories, space rovers, delivery robots, and many school STEM projects.
The controller board is the robot's brain because it receives information from sensors and sends commands to motors and other parts. Sensors such as cameras, bumpers, and ultrasonic distance sensors help the robot notice obstacles or find objects. Motors turn electrical energy from the battery into motion, while wheels, wires, and the frame help carry and connect everything. A claw or gripper lets the robot act on its environment by picking up, pushing, or holding objects.
Key Facts
- Robot system: sensors collect input, controller processes it, actuators create output.
- Speed = distance ÷ time.
- Distance = speed × time.
- A motor changes electrical energy into motion.
- A battery stores chemical energy and supplies electrical energy to the robot.
- Wires carry electrical signals and power between the battery, controller board, sensors, and motors.
Vocabulary
- Frame
- The frame is the robot's body structure that holds all the parts in place.
- Controller board
- The controller board is the robot's brain that runs instructions and controls other parts.
- Sensor
- A sensor is a part that detects information from the environment, such as distance, light, touch, or images.
- Motor
- A motor is a device that uses electricity to make parts move or spin.
- Gripper
- A gripper is a robot hand or claw used to hold, pick up, or move objects.
Common Mistakes to Avoid
- Calling the battery the brain of the robot is wrong because the battery only supplies power, while the controller board makes decisions and sends commands.
- Forgetting the sensors is a mistake because a robot needs input to react to obstacles, lines, objects, or people around it.
- Mixing up motors and wheels is wrong because motors create the turning force, while wheels use that force to roll across the ground.
- Connecting wires randomly is unsafe and incorrect because wires must connect the right parts so power and signals go to the correct places.
Practice Questions
- 1 A robot travels 120 centimeters in 6 seconds. What is its speed in centimeters per second?
- 2 A robot moves at 15 centimeters per second for 8 seconds. How far does it travel?
- 3 A wheeled robot keeps bumping into a wall before turning. Which part could help it detect the wall earlier, and how would that improve the robot's behavior?