Building Instructions -

• EV3-G

This attachment is designed for the Smaller Pancake - SPIKE Prime Box Robot and completes Mission 09: What’s on Sale? in the FIRST LEGO League 2025-2026 UNEARTHED competition. It pulls the horizontal axle to raise the roof, then presses the lever to lift the wares.

This attachment is designed for the Smaller Pancake - SPIKE Prime Box Robot and is used to complete Mission 05: Who Lived Here?, Mission 06: Forge, and Mission 07: Heavy Lifting in the FIRST LEGO League 2025-2026 UNEARTHED competition. The attachment positions the robot accurately in front of the mission models and interacts with each mechanism in sequence. In one run, it presses the Forge lever to release the stones, activates the Who Lived Here? model, and pushes a stone into the Right base. In a separate run, it pushes or captures the Millstone and transports it to the Right base.

This robot is designed to lift a cup smoothly while keeping it upright. With a motor attached to the side of the Hub, the robot can raise the cup to different angles.

With a few adjustments, you could even replace the LEGO cup and try lifting a real one. Just be careful with liquids - the robot doesn’t enjoy drinks as much as you do!

Xogo means “game” in Galician.

The robot moves using two medium motors. It has a distance sensor in the front to detect the next robot and a force sensor in the back to detect the robot behind it in the relay. Build two or more robots and you can create a whole relay!

Download button at the bottom.

This is a program we created for the LED strip display course.

#include <Adafruit_NeoPixel.h>

#define  LED_COUNT 20
#define  StripPin A2
#define  HallEffectSensorPin 6
#define  HallEffectGNDPin 5
#define  HallEffectVCCPin 4

int startSeconds = 20;
int startMinutes = 10;
int startHours = 1;

int secondsArrow;
int minutesArrow;
int hoursArrow;

int arrowPosition;

int hallSensorPastState = LOW;
int hallSensorRead;
int timeForOneRotation = 1;
unsigned long RPMTimer = millis();

Adafruit_NeoPixel leds = Adafruit_NeoPixel(LED_COUNT, StripPin, NEO_GRB + NEO_KHZ800);

int color[3] = {255, 100, 150};
int secondsColor[3] = {255, 0, 0};
int minutesColor[3] = {0, 255, 0};
int hoursColor[3] = {0, 0, 255};

void setup(){
  pinMode(HallEffectSensorPin, INPUT);
  pinMode(HallEffectGNDPin, OUTPUT);
  pinMode(HallEffectVCCPin, OUTPUT);
  digitalWrite(5, LOW);
  digitalWrite(HallEffectVCCPin, HIGH);

  leds.begin();
  leds.setPixelColor(19, color[0], Color[1], color[2]);
}

void loop(){
  RPMUpdate();
  ClearLedsWithoutTheLastOne();
  arrowPosition = StateFrom60();

  secondsArrow = ((int) floor(( millis() / 1000) + startSeconds) % 60);
  minutesArrow = ((int) floor(( millis() / 60000) + startMinutes) % 60);
  hoursArrow = ((int) floor(( millis() / 3600000) + startHours) % 12) * 5;

  if (arrowPosition == secondsArrow){
    for (int i = 0; i < LED_COUNT - 3; i ++){
      leds.setPixelColor(i, secondsColor[0], secondsColor[1], secondsColor[2]);
    }
  }
  
  if (arrowPosition == minutesArrow){
    for (int  i = 0; i < LED_COUNT - 6; i ++){
      leds.setPixelColor(i, minutesColor[0], minutesColor[1], minutesColor[2]);
    }
  }
  
  if (arrowPosition == hoursArrow){
    for (int i = 0; i < LED_COUNT - 10; i ++){
      leds.setPixelColor(i, hoursColor[0], hoursColor[1], hoursColor[2]);
    }
  }

  if (arrowPosition % 5 == 0){
    leds.setPixelColor(18, color[0], color[1], color[2]);
    leds.setPixelColor(17, color[0], color[1], color[2]);
  }
  leds.show();
}

void RPMUpdate(){
  hallSensorRead = digitalRead(HallEffectSensorPin);

  if(hallSensorRead != hallSensorPastState){
    if(hallSensorRead == HIGH){
      timeForOneRotation = millis() - RPMTimer;
      RPMTimer = millis();
      hallSensorPastState = HIGH;
    }
    else{
      hallSensorPastState = LOW;
    }
  }
}

void ClearLedsWithoutTheLastOne(){
   for(int i = 0; i < LED_COUNT - 1; i ++){leds.setPixelColor(i, 0);}
}

int StateFrom60(){
   return (int)floor(((millis() - RPMTimer) * 60) / timeForOneRotation) % 60;
}

This attachment for the Nautiq robot is designed to align the robot to the wall during the FIRST LEGO League 2024‑2025 SUBMERGED competition. It ensures consistent positioning for reliable mission execution.

These are 3D Building Instructions for an Alternative M03 Coral Reef mission model for the FIRST LEGO League 2024-2025 SUBMERGED competition. For the original mission model, see M03 Coral Reef.

These are 3D Building Instructions for an Alternative M09 Unexpected Encounter mission model for the FIRST LEGO League 2024-2025 SUBMERGED competition. For the original mission model, see M09 Unexpected Encounter.

These are 3D Building Instructions for an Alternative M14 Research Vessel mission model for the FIRST LEGO League 2024-2025 SUBMERGED competition. For the original mission model, see M14 Research Vessel.

This example hook for the Nautiq robot is designed to attach other attachments to the wall during the FIRST LEGO League 2024‑2025 SUBMERGED competition. It is provided as a sample; the best hooks are custom-made to match the attachments they are intended to hold.

These are 3D Building Instructions for an Alternative Theater Scene Change mission model for the FIRST LEGO League 2023-2024 MASTERPIECE competition.

These are 3D Building Instructions for an Alternative Craft Creator mission model for the FIRST LEGO League 2023-2024 MASTERPIECE competition.

These are 3D Building Instructions for an Alternative Virtual Reality Artist mission model for the FIRST LEGO League 2023-2024 MASTERPIECE competition.

These are 3D Building Instructions for an Alternative Augmented Reality Statue mission model for the FIRST LEGO League 2023-2024 MASTERPIECE competition.

These are 3D Building Instructions for an Alternative Movie Set mission model for the FIRST LEGO League 2023-2024 MASTERPIECE competition.

A FIRST LEGO League 2023-2024 attachment for the MiniBox Robot.

This attachment is designed to detach, once it completes its purpose. This is done, so that the team loses less time switching attachments in the base, lowering the chance of human error during the competition.

This is an alternative model for the FIRST LEGO League 2022-2023 SUPERPOWERED built only with LEGO Education SPIKE Prime parts. The goal of the model is to be able to experiment and learn without the need to have the real parts, that at this moment are almost impossible to find and gather.

This is an alternative model for the FIRST LEGO League 2022-2023 SUPERPOWERED built only with LEGO Education SPIKE Prime parts. The goal of the model is to be able to experiment and learn without the need to have the real parts, that at this moment are almost impossible to find and gather.

This is an alternative mission model for the FIRST LEGO League 2022-2023 M11 Hydroelectric Dam mission model. It is a rather complex mission model as it requires the robot to accomplish actions like Lever, Hang, Lift. At the same time it is quite fun.

This is an alternative model for the FIRST LEGO League 2022-2023 SUPERPOWERED built only with LEGO Education SPIKE Prime parts. The goal of the model is to be able to experiment and learn without the need to have the real parts, that at this moment are almost impossible to find and gather.