2. Introduction
Leakage of LPG or Natural Gas can be dangerous as it raises the risk of building fire,
suffocation or an explosion.
For every 20L volume of air, 2% to 10% of LPG in air is enough to cause an explosion.
The presence of dangerous LPG(Liquefied Petroleum Gas) or Natural leakage in the
homes can be detected using the Gas Sensor.
This Protection System can be easily integrated into a unit that detect & sound an
alarm
7. Overview on Microcontroller
A microcontroller (sometimes abbreviated µC, uC or MCU) is a small computer on a
single integrated circuit containing a processor core, memory, and programmable
input/output peripherals.
Microcontrollers are designed for embedded applications or automatically controlled
products and devices.
8. ATmega32 Microcontroller
> High-performance, Low-
power AVR 8-bit
Microcontroller
> 32k Bytes of In-System
Self-Programmable Flash
Memory- 1024K Bytes
EEPROM
> 2K Bytes Internal SRAM
> Programming Lock for
Software Security
> On-chip Analog
Comparator
> Master/Slave SPI Serial
Interface
> Two 8-bit Timer/Counters
with Separate Prescalar,
Compare
> Four PWM Channels
> Programmable Serial
USART
> 8-channel, 10-bit ADC
> Byte-oriented Two-wire
Serial Interface
> Internal Calibrated RC
Oscillator
> External and Internal
Interrupt Sources
> 32 Programmable I/O Lines
> 4.5-5.5V for ATmega32
> 0-16 MHz for ATmega32
> One 16-bit TImer/Counter
with Seperate Prescaler,
> Real Time Counter with
Seperate Oscillator
