Let’s Make a Sushi-Go-Round Robot With LEGO SPIKE Prime and C!

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Let’s Make a Sushi-Go-Round Robot With LEGO SPIKE Prime and C!

Want to combine Japanese culture and robotics?

We built a sushi-go-round (like the ones in real sushi restaurants!) using LEGO SPIKE Prime, and we made it run with C programming. It’s fun, interactive, and surprisingly easy to make!

Supplies

1 PC with Windows 10 or 11 operating system.
SPIKE Prime
Motor
Force Sensor
Color Sensor

Robot Setup

Rolling Sushi with C and LEGO SPIKE Prime - Exploring Japanese Culture Through Robotics and Code

Here’s how we built it:

Conveyor Belt: Controlled by a motor
Order Buttons: Made with force sensors
Order Display: The hub's built-in LED buttons
Sushi Detection: Uses a color sensor

Features

Conveyor Belt

The sushi moves smoothly around on a rotating belt, just like in a real sushi restaurant!

When someone places an order, the belt stops exactly in front of the customer’s spot using a rotation sensor. No sushi goes flying off!

Order Buttons + LED Display

There are 3 sushi types you can order, each with its own button.

Push the button for the sushi you want, and the hub’s LED lights up in that sushi’s color.

Each button has a different pressure level using the force sensor, so the robot knows which sushi was ordered!

Sushi Detection

The color sensor watches the belt and looks for the sushi colors.

When it sees the ordered sushi passing by, the robot stops the belt right on time so the sushi arrives at the right place.

pup_motor_t *Lmotor;

pup_device_t *ColorSensor;

pup_device_t *ForceSensor;

void Main(intptr_t exinf)

{

Lmotor = pup_motor_init(PBIO_PORT_ID_B, PUP_DIRECTION_CLOCKWISE);

ColorSensor= pup_color_sensor_get_device(PBIO_PORT_ID_D);

ForceSensor = pup_force_sensor_get_device(PBIO_PORT_ID_E);

int force_max,force_current;

char sushi_name;

dly_tsk(1000000);

pup_motor_set_speed(Lmotor , 60);

while(1) {

force_max = 0;

force_current = (int)pup_force_sensor_force(ForceSensor);

if(force_current > 2){

while(force_current > 2){

if (force_current > force_max ){ force_max = force_current; }

force_current = (int)pup_force_sensor_force(ForceSensor);

}

switch(force_max) {

case 3:

sushi_name = 'y';

hub_light_on_color(PBIO_COLOR_YELLOW);

break;

case 4:

sushi_name = 'r';

hub_light_on_color(PBIO_COLOR_RED);

break;

case 5:

sushi_name = 'g';

hub_light_on_color(PBIO_COLOR_GREEN);

break;

default:

break;

}

while(pup_color_sensor_color_name(ColorSensor, true) != sushi_name){}

pup_motor_reset_count(Lmotor);

pup_motor_set_speed(Lmotor , 60);

while(!(pup_motor_get_count(Lmotor) > 100)){}

pup_motor_stop(Lmotor);

dly_tsk(3000000);

hub_light_off();

pup_motor_set_speed(Lmotor , 60);

}

Let’s Enjoy Robotics + Japanese Culture!

Making this robot was super fun, and it’s a great way to explore both Japanese food culture and C programming.

Try making your own sushi robot—what sushi would you serve first?

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