S
SENSEUltrasonic Sensor
The robot detects what is around it.
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ROBOTICS LAB
JUNIOR SECONDARY • INTRODUCTION
01/12
ROBOTICS PROJECT
Can a Robot See an Obstacle?
Today, we're meeting the robot we'll build in our next practical class.
SENSE → THINK → ACT
OBJECT
DETECTED
ONE SIMPLE JOB
Our Robot Has One Simple Job
OBJECT
GETS CLOSE
01OBJECT GETS CLOSE↓
02ROBOT DETECTS IT↓
03LED TURNS ON
Object far away → LED OFF
Object close → LED ON
The robot detects objects that are close to it.
THE ROBOT RECIPE
Every Smart Robot Needs 3 Things
→
T
THINKArduino Uno
The robot processes information and makes decisions.
→
A
ACTLED
The robot shows the result of the decision.
SENSE→THINK→ACT
MEET THE BRAIN
The Brain
Arduino Uno
Arduino is the brain of our robot.
Receives informationRuns our programMakes decisionsControls the output
ARDUINO UNO
INPUTDECISIONSOUTPUTMEET THE SENSOR
The Sensor
OBJECT
Ultrasonic Sensor
Its job: Detect how far away an object is.
01SENDS SOUND
02SOUND BOUNCES BACK
03ARDUINO CALCULATES DISTANCE
OBJECT DETECTED8 cm
MEET THE OUTPUT
The Actuator
LED
Its job: Show us what the robot has decided.
Object close → LED ON
Object far → LED OFF
SWITCHING
THE TOOLKIT
What Else Will We Need?
Arduino Uno
Ultrasonic Sensor
LED
Breadboard
Jumper Wires
Resistor
BreadboardHelps us connect components without soldering.
Jumper WiresCarry electrical connections between components.
ResistorHelps protect the LED by limiting current.
A VISUAL PREVIEW
How Will Our Robot Work?
A preview of the project — no wiring needed here.
USULTRASONIC SENSOR
SENSES DISTANCE
AUARDUINO UNO
MAKES A DECISION
LEDLED
SHOWS THE RESULT
THE ROBOT'S LOGIC
Now Let's Teach the Robot to Think
01MEASURE DISTANCE
↓
02Is the object closer than 10 cm?
YES→LED ON
NO→LED OFF
This is called a CONDITION.IF something is true → do something.
THINK LIKE A ROBOT
Imagine You Are the Robot
If you were the robot, what would you do?
OBJECT FAR AWAYNOTHING HAPPENS
OBJECT VERY CLOSEWARNING!
SThe ultrasonic sensor detects.
TArduino decides.
ALED responds.
COMING NEXT
Our Next Robotics Challenge
1AUArduino Uno
2BBBreadboard
3USUltrasonic Sensor
4LEDLED
5RResistor
6JWJumper Wires
✓NEXT PRACTICAL: WE BUILD IT!Today was the preview. The hands-on challenge comes next.
THE BIG IDEA
Remember This!
SSENSEUltrasonic Sensor
↓TTHINKArduino Uno
↓AACTLED
That's how our obstacle detection robot works.
NEXT CLASS:WE BUILD THE ROBOT!