Arduino Project

Arduino Rock Paper Scissors Game with OLED Display V1

Kit purchase

Looking for parts? Check out our all-in-one kits below — packed with components, beginner-friendly guides, and tons of fun.

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Name	Includes Arduino board	PURCHASE LINK
Elite Explorer Kit	Arduino Uno R4 WiFi	BUY
3 in 1 Ultimate Starter Kit	Arduino Uno R4 Minima	BUY

Course Introduction

In this project, you will use an Arduino board, a servo motor, and an Ultrasonic Sensor Module to build a RPS machine.

Note

If this is your first time working with an Arduino project, we recommend downloading and reviewing the basic materials first.

1.1 Install Arduino IDE(Important)
1.2 Introduction of Arduino IDE

Required Components

In this project, we need the following components:

SN	COMPONENT INTRODUCTION	QUANTITY	PURCHASE LINK
1	Arduino UNO R4 Minima/Arduino UNO R4 WIFI	1	BUY
2	USB Type-C cable	1	×
3	Breadboard	1	BUY
4	Wires	Several	BUY
5	Digital Servo Motor	1	BUY
6	Ultrasonic Sensor Module	2	BUY

Wiring

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Common Connections:

Digital Servo Motor
Connect to breadboard’s positive power bus.
Connect to breadboard’s negative power bus.
Connect to 3 on the Arduino.

Ultrasonic Sensor Module Front
Trig: Connect to 10 on the Arduino.
Echo: Connect to 11 on the Arduino.
GND: Connect to breadboard’s negative power bus.
VCC: Connect to breadboard’s red power bus.

Writing the Code

Note
You can copy this code into Arduino IDE.
Don’t forget to select the board(Arduino UNO R4 Minima/WIFI) and the correct port before clicking the Upload button.

#include <Servo.h>

// Ultrasonic sensor pins
const int trigPin = 10;
const int echoPin = 11;

// Servo signal pin
const int servoPin = 3;

Servo gameServo;

// Prevent repeated triggering
bool hasPlayed = false;

// Variables for shake animation
int shakePos = 60;
bool movingRight = true;

void setup() {
  Serial.begin(9600);

  // Set ultrasonic sensor pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  // Attach servo motor
  gameServo.attach(servoPin);

  // Start from the center position
  gameServo.write(90);

  // Create a random seed
  randomSeed(analogRead(A0));
}

void loop() {
  // Read the current distance
  float distance = readDistance();

  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Hand detected: show a random result
  if (distance > 0 && distance < 15 && !hasPlayed) {
    playGame();
    hasPlayed = true;
  }

  // Reset when the hand moves away
  if (distance >= 20 || distance == -1) {
    hasPlayed = false;
  }

  // Keep shaking while waiting
  if (!hasPlayed) {
    shakeAnimation();
  }

  delay(30);
}

// Measure distance with the ultrasonic sensor
float readDistance() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long duration = pulseIn(echoPin, HIGH, 30000);

  // No signal received
  if (duration == 0) {
    return -1;
  }

  // Convert time to distance
  return duration / 58.0;
}

// Servo shake animation
void shakeAnimation() {
  if (movingRight) {
    shakePos += 3;

    if (shakePos >= 120) {
      movingRight = false;
    }

  } else {
    shakePos -= 3;

    if (shakePos <= 60) {
      movingRight = true;
    }
  }

  gameServo.write(shakePos);
}

// Randomly choose Rock, Paper, or Scissors
void playGame() {
  int result = random(0, 3);

  if (result == 0) {
    gameServo.write(0);
    Serial.println("Rock!");
  }
  else if (result == 1) {
    gameServo.write(90);
    Serial.println("Paper!");
  }
  else {
    gameServo.write(180);
    Serial.println("Scissors!");
  }

  delay(1000);
}

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Arduino Project

Arduino Rock Paper Scissors Game with OLED Display V1

Kit purchase

Course Introduction

Required Components

Wiring

Common Connections:

Writing the Code

Arduino Project

Arduino Rock Paper Scissors Game with OLED Display V1

Kit purchase

Course Introduction

Required Components

Wiring

Common Connections:

Writing the Code

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