Computer Science
Grade 6
20 min
Building a Simple Robot: Assembling the Hardware
Students will build a simple robot using a kit or individual components.
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1
Introduction & Learning Objectives
Learning Objectives
Identify the main hardware components of a simple robot (microcontroller, motors, sensors, chassis).
Explain the function of each core component, such as the microcontroller being the 'brain'.
Follow a diagram to correctly assemble a robot chassis.
Securely connect motors and wheels to the robot chassis.
Connect wires from components to the correct ports on a microcontroller.
Demonstrate safe handling practices, like connecting the power source last.
Ever wanted to build your very own robot sidekick? 🤖 Today, we're going to build the robot's body before we teach it how to think!
In this lesson, you will learn about the different physical parts that make up a robot and how to put them together. This is the first and most important ste...
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Key Concepts & Vocabulary
TermDefinitionExample
MicrocontrollerThe 'brain' of the robot. It's a small computer that you will program to tell the robot what to do.An Arduino board or a micro:bit. It has special pins where you plug in all the other parts.
ChassisThe 'skeleton' or frame of the robot. It holds all the other parts together.A flat piece of plastic or metal with holes for screws, where you attach the motors, wheels, and microcontroller.
ActuatorA part that makes the robot move. The most common type is a motor.A DC motor that spins a wheel, or a servo motor that moves a robot arm up and down.
SensorA part that lets the robot 'sense' the world around it, like eyes or ears.An ultrasonic distance sensor that uses sound to see how far away an object is.
Power SourceThe part...
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Core Syntax & Patterns
Power Off First
Always make sure the power source (batteries) is disconnected before you plug in or unplug any parts.
Use this rule every time you build or change your robot. This prevents electricity from flowing at the wrong time, which could damage the sensitive microcontroller 'brain'.
Match the Pins
Connect wires to the correct pins on the microcontroller as shown in the instructions.
Each pin on the microcontroller has a specific job. Connecting a motor to a sensor pin won't work. Always double-check your diagram to match the wire to the labeled pin (e.g., 'GND' for ground, '5V' for power).
Righty-Tighty, Lefty-Loosey
Turn screws to the right (clockwise) to tighten them and to the left (counter-clockwise) to loosen them.
Use t...
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Challenging
You are designing a robot to solve a maze. The maze has physical walls, but also a black line on the floor that marks the correct path. To build the most effective robot, what combination of sensors should you assemble onto the chassis?
A.Two light sensors and a sound sensor.
B.temperature sensor and a humidity sensor.
C.Two ultrasonic sensors, one on the front and one on the back.
D.An ultrasonic sensor to detect walls and a line-following sensor to see the path.
Challenging
When assembling a robot, you see an option to add a gearbox between the motor and the wheel. Compared to connecting the wheel directly to the motor, what is the most likely effect of adding the gearbox?
A.The robot will have a higher top speed but will be weaker.
B.The robot will be much quieter but will use more battery.
C.The robot will have a lower top speed but higher torque (more pushing power).
D.The robot's direction of movement will be permanently reversed.
Challenging
Your fully assembled robot suddenly stops working, and the power indicator light on the microcontroller is off. Your code was working perfectly before. What is the most logical sequence of hardware troubleshooting steps?
A.1. Re-upload the code. 2. Check the motor wires. 3. Replace the microcontroller.
B.1. Check if the batteries are charged/fresh. 2. Check that the battery pack is securely connected. 3. Check that the robot's power switch is on.
C.1. Replace all the jumper wires. 2. Check the ultrasonic sensor. 3. Tighten the wheels.
D.1. Disassemble the entire robot. 2. Check for scratches on the chassis. 3. Rebuild the robot from scratch.
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Start Practicing FreeMore from Introduction to Robotics: Building and Programming Simple Robots
What is Robotics? Exploring the World of Robots
Introduction to Robot Components: Sensors, Actuators, and Controllers
Introduction to Block-Based Programming: Programming the Robot's Behavior
Controlling Movement: Programming the Robot to Move Forward, Backward, and Turn
Using Sensors: Programming the Robot to React to its Environment