1. Final Term Project Hi-Tek Smoke Detektor By: Rohan Sharma

2. Conceptual Idea A smoke detector that changes LED color from green (indicating everything is OK) to red Buzzer also sounds when enough smoke collects E-mail is sent to user with personalized subject and message to alert them that there is a possible fire Works due to the fact that smoke will inhibit the amount of light reaching photocell; when certain threshold is reached, alarm sounds and email is sent

3. How to Build Materials List: -Arduino + Breadboard -GoBetwino (free software) -Plexiglass -Laser cutter -Drill Press -Caulk Gun -Solder -Piezzo Buzzer -RGB -Wires + Resistors + Photocell

4. How to Build Pt. 1: Outer Casing Step 1: Cut Plexiglass into 6 pieces to form a rectangular prism in order to encase Arduino + Breadboard Step 2: Laser cut out square to accommodate USB Cable into one side, drill holes into 3 remaining sides Step 3: Attach all sides together (with Arduino inside) using caulk Step 4: Bend back breadboard using rope in order to allow all components to fit Step 5: Solder Piezzo Buzzer wires to regular wires, then attach to Pin 11 and GND

5. How to Build Pt. 2: Circuit Diagrams

6. How to Build Pt. 3: Code int photosensor = A1; // sets photocell to analog pin 1 int sensorValue = 0; // sets initial sensor value to 0 int greenPin = 10; sets green pin to digital pin 10 int redPin = 13; sets red pin to digital pin 13 int pinSpeaker = 11; sets pin speaker to digital pin 11 void setup() { Serial.begin(9600); pinMode(photosensor, INPUT); // turns photocell into an input pinMode(greenPin, OUTPUT); // sets the green LED as an output pinMode(redPin, OUTPUT); // sets the red LED as an output pinMode(pinSpeaker, OUTPUT); // sets the speaker as an output } void loop() { int brightness = analogRead(photosensor); // defines brightness as a function of the photocell value if (brightness >= 250) { digitalWrite(greenPin, HIGH); digitalWrite(redPin, LOW); digitalWrite(pinSpeaker, LOW); } // if brightness is greater than or equal to 250, turns green LED on, the red LED off, and the buzzer off else if (brightness < 250) { digitalWrite(redPin, HIGH); digitalWrite(greenPin, LOW); digitalWrite(pinSpeaker, HIGH); Serial.println("#S|MAILMAN|[]#"); } // if brightness is less than 250, turns the red LED on, the green LED off, the Buzzer on, and tells the Gobetwino to send a personalized email }

7. Problems/Possible Solutions Smoke not dense enough to trigger change in photocell  Create chamber to collect smoke around photocell Too many holes drilled in plexiglass, allowed smoke to dissipate too fast  Drill less holes/Tape over some holes