Published November 24, 2021

Trickster Halloween Candy box

This is not your traditional Halloween candy box!

IntermediateProtip193

Things used in this project

Hardware components

Jumper wires (generic)

Ultrasonic Sensor - HC-SR04 (Generic)

Solderless Breadboard Half Size

Particle Argon

SG90 Micro-servo motor

button

PIR Motion Sensor (generic)

Resistor 1k ohm

Software apps and online services

Particle Build Web IDE

Particle Pi

Hand tools and fabrication machines

Hot glue gun (generic)

Drill / Driver, 20V

Story

Introduction

So every year for Halloween we have two options. We can either Treat... or we can Trick. For our group we decided to choose the second option and we created a Halloween box full of tricks.

Why did we do this?

This project consists of developing devices that collaborate together to detect motion from its surroundings within a certain distance. Once a child approaches the Halloween box, they must first press the button positioned on the exterior of the box which in return causes the servo motor attached to the interior of the box to activate, causing the lid to open. Then, the child will reach forward with hopes to acquire a piece of candy but to their surprise, the lid will begin to shut due to the motion received by the ultrasonic sensor.

How will this help?

This project uses particle argons to transfer information and data by using the internet. The data the sensors provide help to gain a better understanding as to where the child is in relation to the Halloween box. This project would become very useful to an individual that has younger brothers and sisters that take all your candy.

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Code

// This #include statement was automatically added by the Particle IDE.
#include <HC_SR04.h>

// Sensor gateway using the Argon board. This contains the HC-SR04
// Ultrasonic code and sends data to the other nodes to notify of a trip
int button = A1;
int led = D7;
int inputPin = D2;              // choose the input pin (for PIR sensor)
int reading = 0;
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status

int calibrateTime = 5000;

double cm = 0.0;
bool beam_status = false;

int trigPin = D4;
int echoPin = D5;
unsigned long myChannelNumber = 1579110;
const char * myWriteAPIKey = "O6Q7O42THSM75XQN";

HC_SR04 rangefinder = HC_SR04(trigPin, echoPin);

void setup() 

{
    Spark.variable("cm", &cm, DOUBLE);
    pinMode(button,INPUT);
    pinMode(led,OUTPUT);
    pinMode(inputPin, INPUT);
}

void myHandler(const char *event, const char *data) {

}

void loop() 
{
    cm = rangefinder.getDistanceCM();
    if (cm<30){
        if (beam_status==false){
            
            Particle.publish("tripStatus", "breach");
            beam_status = true;   
        }
    } else {
        if (beam_status==false){
            
        } else {
            Particle.publish("tripStatus", "all_clear");
            beam_status = false;
        }
{
    int reading = digitalRead(button);
    if (reading == LOW){
        digitalWrite(led,LOW);
        
    }
    if (reading == HIGH){
        digitalWrite(led,HIGH);
    
        Particle.publish("buttonStatus", "button_on");
        String data = String(cm);
        
    }
    }
     const char * eventName = "tripStatus";
        unsigned long myChannelNumber =1579020;
        const char * myWriteAPIKey = "O6Q7O42THSM75XQN";
        Particle.publish(eventName, "{ \"Centimeters\": \"" + String(cm) + "\", \"key\": \"" + myWriteAPIKey + "\" }", PRIVATE, NO_ACK);  
   
delay(2000);
}
}

Servo myservo;  // create servo object to control a servo

int pos = 120;    // variable to store the servo position

void setup()
{
    Particle.subscribe("buttonStatus", myHandler); // subscribing to the published event from the phototransistor photon
    Particle.subscribe("tripStatus", myHandler);
    myservo.attach(D2);   // attach the servo on the D0 pin to the servo object
    pinMode(D7, OUTPUT);
}

void myHandler(const char *event, const char *data)
{ 
    if(strcmp(data,"button_on")==0) {  // this will move the servo to the on position
        digitalWrite(D7, HIGH);
        myservo.write(180);
        digitalWrite(D7, LOW);
        
    }
    else if(strcmp(data,"breach")==0){     // this will move the servo to the off position
        myservo.write(120);// move servo to 0
        
    }
}

void loop()
{
}

Trickster Halloween Candy box

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Introduction

Why did we do this?

How will this help?

Schematics

Ultrasonic with button

Servo Motor

Code

Ultrasonic code

Servo Motor Code

Credits

Jesse Lawler

Jared Lawler

Cale Cozad

Comments

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Trickster Halloween Candy box

Trickster Halloween Candy box

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Introduction

Why did we do this?

How will this help?

Schematics

Ultrasonic with button

Servo Motor

Code

Ultrasonic code

Servo Motor Code

Credits

Jesse Lawler

Jared Lawler

Cale Cozad

Comments

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