Assignment: DC Motor: Actuation Assignment 1

Collaborators:

Description

I got out of bed late this morning. The alarm went off, but I slept through it. Well, no more. For this project, I created a light sensitive, vibrating, beeping alarm, and in consideration of my neighbors, it is only active when my empty coffee cup is on the bed side table.

Materials

• photocell
• motor
• FSR
• resistors
• battery pack
• cork
• arduino

Programs

Arduino

/*
    * Ben C.
     * Coffee Cup Present? Alarm is photo sensitive!
     */

    int photoPin = 0;   // the photocell
    int fsrPin = 1; // The fsrpin
    int motorPin = 9; // the motor
    int speakerPin = 7; // the speaker
    int val = 0;      // variable to store the value coming from the photocell
    int fsrVal = 0;
    boolean cupPresent = false;
    boolean dark = false;

    void setup() {
      pinMode(speakerPin, OUTPUT); 
      Serial.begin(9600);
    }
    void loop() {
      fsrVal = analogRead(fsrPin);
      cupPresent = iscuppresent(fsrVal);
      if(cupPresent)
      {
        val = analogRead(photoPin);    // read the value from the sensor, between 0 - 1024
        dark = isitdark(val);
        if (!dark)
        {
          Serial.println(val);
          analogWrite(motorPin, val/4); // analogWrite can be between 0-255
          for( int i=0; i<50; i++ ) {  // play it for 5 cycles
            digitalWrite(speakerPin, HIGH);
            delayMicroseconds(val);
            digitalWrite(speakerPin, LOW);
            delayMicroseconds(val);
          }
        }
        else
        {
          analogWrite(motorPin, 0);
        }
      }
      else
      {
        digitalWrite(speakerPin, LOW);
        analogWrite(motorPin, 0);
      }
    }

    boolean iscuppresent(int val)
    {
      int threshhold = 100;
      if (val > threshhold)
      {
        return true;
      }
      return false;
    }

    boolean isitdark(int val)
    {
      int threshhold = 100;
      if (val < threshhold)
      {
        return true;
      }
      return false;
    }