README.md

Useless Box - Lab 5

A lab report by Natalie B. Abrams

3D Printing

a. Include a photo of your printed part here.

Here are the iterations I made for my arm. The left was the first protoype, and the final product is attached on the motor.

b. Include .stl or .svg files for your bopper, if 3d-printing.

First iteration of booper file

Laser Cutting

b. Include a photo of your box here.

Electronics

c. Upload code & a photo of your electronic circuit here.

Putting it All Together

Include here:

1. Your Arduino code.

#include <Servo.h> 

// Sweeper is a simple wrapper class for Servo that toggles a servo between two predetermined positions.
class Sweeper
{
  
private:
   Servo servo;
   static const int closedPos = 180;
   static const int openPos = 90;

public: 
  // constructor
  Sweeper() {}

  // Tell us the pin number is the servo control wire attached to.
  // Attach will set the pin to OUTPUT for pwm control of a servo.
  void Attach(int pin)
  {
    servo.attach(pin);
  }
  
  void Detach()
  {
    servo.detach();
  }

  // reset the servo position to our initial state
  void Reset()
  {
    servo.write(closedPos);
  }

  // set the servo to its "open box" position.  this should move the attached
  // servo arm enough to open the box and trigger the toggle switch back to off,
  // which will tell our servo to return to its initial postion.
  void Activate()
  {
    servo.write(openPos);
  }
};

Sweeper myServo;

//volatile bool switchChanged = false;  // this flag is used to send switch state info to the serial port
volatile int previousSwitchState = LOW;

void setup()
{
  //Serial.begin(9600);
  //Serial.println("Useless Box Lab 5");
  
  myServo.Attach(10);
  myServo.Reset();

  pinMode(2, INPUT); 

  // this line causes the ToggleSwitch() interrupt service routine to be called if the state of pin 2 changes
  attachInterrupt(digitalPinToInterrupt(2), ToggleSwitch, CHANGE);
}

// this is called when the input on pin 2 changes (LOW to HIGH *or* HIGH to LOW)
void ToggleSwitch()
{
  int switchState = digitalRead(2);
    
  if (switchState != previousSwitchState)
  {
    //switchChanged = true; // look for this flag in loop() in order to send state info to the serial port.
    if (switchState == HIGH)
      myServo.Activate();
    else
      myServo.Reset();

    previousSwitchState = switchState;  // remember that the switch state has changed
  } 
}
  
void loop()
{ 
}

A video of my useless box in action