By:

M.HEMA SAI

V.SIVANANDA SIDHARDA

S.GANESH KUMAR

Now we are going to build a very interesting project – a Fire Alarm System which will send SMS to a set of Mobile Numbers when fire occurs in a particular location. We have seen many typical Fire Alarm projects which will alert with a siren or an automatic shutdown mechanism. This fire alarm project make use of modern communication technologies to deal with emergencies.

Circuit diagram:

ARDUINO

Arduino is an open-source computer hardware and software company, project and user community that designs and manufactures microcontroller-based kits for building digital devices and interactive objects that can sense and control the physical world.

ARDUINO

Microcontroller ATmega328P

Operating Voltage 5V

Input Voltage (recommended) 7-12V

Input Voltage (limit) 6-20V

Digital I/O Pins14 (of which 6 provide PWM

output)

PWM Digital I/O Pins 6

Analog Input Pins 6

DC Current per I/O Pin 20 mA

DC Current for 3.3V Pin 50 mA

Flash Memory32 KB (ATmega328P)

of which 0.5 KB used by bootloader

SRAM 2 KB (ATmega328P)

EEPROM 1 KB (ATmega328P)

Clock Speed 16 MHz

Length 68.6 mmWidth 53.4 mm

Weight 25 g

TECHNICAL SPECIFICATIONS:

GSM (Global System for Mobile communications) is an open,

digital cellular technology used for transmitting mobile voice and

data services

GSM Module:

GSM uses narrowband TDMA, which allows eight

simultaneous calls on the same radio frequency.

There are three basic principles in multiple access, FDMA

(Frequency Division Multiple Access), TDMA (Time Division

Multiple Access), and CDMA (Code Division Multiple Access). All

three principles allow multiple users to share the same physical

channel. But the two competing technologies differ in the way

user sharing the common resource.

LM35 is a precision IC temperature sensor with its

output proportional to the temperature (in oC). The

sensor circuitry is sealed and therefore it is not

subjected to oxidation and other processes.

With LM35, temperature can be measured more

accurately than with a thermistor. It also possess low

self heating and does not cause more than 0.1 oC

temperature rise in still air.

The operating temperature range is from -55°C to

150°C. The output voltage varies by 10mV in

response to every oC rise/fall in ambient

temperature,i.e., its scale factor is 0.01V/ oC.

PIN DIAGRAM:

Description: This is a basic 16 character by 2 line display. Black text on Green background. Utilizes the extremely common HD44780 parallel interface chipset (datasheet). Interface code is freely available. You will need ~11 general I/O pins to interface to this LCD screen. Includes LED backlight.

Dimensions: 3.15" x 1.425"

THANK YOU