10-08-2011, 03:50 PM
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AUTOMATIC ENERGY SAVING SYSTEM WITH HUMAN HEAT DETECTION
OBJECTIVE
The main objective of this project is used to save power
INTRODUCTION
Introduction
Embedded Systems
Embedded Systems is the evolution or further development of computing system.
An embedded system is a combination of computer circuitry and software that is built into a product for purposes such as control, monitoring and communication without human intervention.
Embedded systems
One of the first recognizably modern embedded systems was the Apollo Guidance Computer, developed by Charles Stark Draper at the MIT Instrumentation Laboratory.
Special microprocessors are used in embedded systems to reduce cost for mass production. These microprocessors have simplified architecture, low performance and low cost comparing to general-purpose processors.
AUTOMATIC ENERGY SAVING SYSTEM WITH HUMAN HEAT DETECTION
Hard ware equipments:
8051 Micro Controller
Power supply
PIR Sensor
Relay
LED
Schematic diagram
Why the name MICROCONTROLLER?
Basically used for control actions. It is used to control the operation of machine using fixed program that is stored in ROM/EPROM and that does not change over the life time.
8051 MICRO CONTROLLER
Features of 8051:
Some of the features that have made the AT89C52 popular are:
Compatible with MCS-51 Products
Endurance: 1,000 Write/Erase Cycles
8K Bytes of In-System Reprogrammable Flash Memory
128 bytes of Internal RAM (128 x 8-bit)
32 Programmable I/O Lines
Two 16-bit Timer/Counters
Five vector two-level interrupt architecture
A full duplex serial port
Three-level Program Memory Lock
Six Interrupt Sources
On-chip oscillator and clock circuitry
Power Supply
A regulated power supply is the power supply with rectification, filtering and regulation being done on the AC mains to get a regulated power supply for microcontroller and for the other devices being interfaced in it.
A power supply can be broken down in to series of blocks, each block performs a particular function.
Block Diagram of typical linear power supply
LED
A light-emitting diode is semiconductor light source.
The first practical LED was invented by Nick Holon yak, Jr., in 1962 while he was at General Electric Company.
Relay
Relays are special switches designed to allow a small circuit to control a larger circuit. These devices use a solenoid to control a heavy-duty switch. The wiring for the solenoid may require only 0.5 amps to activate, while the switch it controls carries 10 to 30 amps.
Relay
Connect the control device to the two solenoid pins of the relay. Supplying a small 12-volt voltage to these two pins will turn the relay switch on or off.
Locate the other three pins. These pins are a SPDT switch.
PIR Sensor
The PIR Sensor Switch can detect the Infrared Rays released by human body.
PIR Sensor Chip
BISS0001 chi
How PIR Sensor Works:
The PIR sensor itself has two slots in it.
When the sensor is idle, both slots detect the same amount of IR.
When a warm body like a human or animal passes in the field vision of sensor, the sensor detects a sudden change in infrared energy then senor is activated and voltage signals will be given to microcontroller
PIR Senso
They are small, inexpensive, low-power, easy to use.
Real Time PCB
EMBEDDED C
Embedded C is the extension to C. The difference between embedded C and C is
The "platform" is where the C compiler runs -- a laptop running Linux or a desktop running Windows.
The "target" is where the executable code generated by the C compiler will run -- the CPU in the embedded system, often without any underlying operating system.
Keil Software
Keil compiler is a software used where the machine language code is written and compiled. After compilation, the machine source code is converted into hex code which is to be dumped into the microcontroller for further processing.
Advantages
This project is used to reduce your electricity bills and will further save your electricity cost for the future.
Very easy installation and can be installed by house technician itself.
No separate wiring is required hence no additional installation cost.
Applications
Common staircase / Entrance / Basement.
Parking areas / garden lights
Living room, Malls, ATMS
Changing rooms in shops
Offices / Conference Room
Corridors & many more!
CONCLUSION
BALANCE OUR MOTHER EARTH
SAVE POWER
