*3 The Device

#Optical Dust Sensor

Sharp's GP2Y101AU0F ia an optical air quality sensor, designed to sense dust particles. An infrared emitting diode and a phototransistor are diagonally arranged into this device, to allow it to detect the reflectd light of dust in air. It is especially effective in detecting very fine particles like cigarette smoke, and is commonly used in air purfier systems.

The sensor has very low current consumption(20mA max, 11mA typical), and can be powered with up to 7VDC. The output of the sensor is an analog voltage proportional tu be measured dust density, with a sensitivity of 0.5V/0.1mg/m3.

To interface with the sensor you need to connect to its 6-pin and 1.5mm pitch

 connector. Meanwhile this is the example of the operation that used this type of dust sensor : 

https://www.youtube.com/watch?v=_JTgAujQjXs

#Arduino Uno

Arduino is an open source physical computing platform based on simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand alone interactive object or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open source IDE can be downloaded .

The Arduino Uno is a mirocontroller board based on the Atmega328. It has 14 digital input/output pins (of which can be used as PWM outputs), 6 analog inputs, a 16Mhz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.

It contains everything needed to support the microcontroller, simply connect it to a computer with a USB cable or power it with a AC to DC adapter or battery to get started.

The Uno differ from all preceding boards in that it does not use the FTDI USB-to-serial driver chip.

Features:

• Microcontroller                      ATmega328
• Operating Value                     5V
• Input Voltage                         7-12V
• Input Voltage(Limit)             6-20V
• Digital I/O Pins                     14 (6 provide PWM Output)
• Analog Input Pins                  6
• DC Current per I/O Pin         40mA
• DC Current for 3.3V Pin       50mA
• Clock Speed                          16MHz

For the beginner Getting Started with Arduino  - UNO

#Arduino Ethernet Shield

The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield.

This is the Tutorial of Room Monitoring Web Server :

An Arduino Room Monitoring Web Server

All the device that i mention above is the main device that i will used to build up my Air Quality Monitoring System. This 3 device will work at the input and process of AQMS operation. But, i might be change the type of Arduino, because there is another type of Arduino that provide the connection of internet. Which is i just have to use one Arduino for my project. The type of that Arduino is, Arduino Yun.

#Arduino Yun

Arduino Yun is the perfect board to use when designing connected devices and, more in general, Internet of things projects. It combine the power of Linux with the ease of use of Arduino.

Features :

• Microcontroller                         ATmega32U4
• Operating Voltage                    5V
• Input Voltage                            5
• Digital I/O                                20
• PWM Channels                        7
• Analog Input Pins                    12
• DC Current per I/O Pin            40mA
• DC Current for 3.3V Pin          50mA
• Clock Speed                             16MHz

There is a device that i will use as a output receiver for this AQMS. All this device will act as a warning sign to the user. This device might be change, all depend on the situation or suitability.

#LCD Display

This LCD Display will place at the device. Which is the user will see the information of air quality directly on the device. This LCD display will always show the current level of air quality. This LCD display will share the same input from Arduino with LED.

#Light Emitting Diode

Colured LED Bulb

This LED bulb will function followed the level of air quality.

At the Good level, the green LED will light up, to notify the user that the current air is very good. For the next stage,  which is Moderate, the Yellow LED will ON. Then for the  three last stage, dangerous, red LED will ON. At this stage, i think, i want to add a device, like alarm, so that the alarm will warn the user about this poor air.

Now, i was thinking to add something at the output of this project, which is at the LCD Display. I also plan to add an alarm . But it depends on the compatiblity. All this plan, i will refer to my Supervisor.

The Level	LED	LCD Display	Alarm
Good	Green,	The API is _____ “The Air is Good”	OFF
Moderate	Yellow	The API is _____ “The Air is Not Good, Please wear a mask”	OFF
Dangerous	Red, Blinking	The API is _____ “The Air is Dangerous, Please wear a mask”	ON