ieee 2012 projects for m tech btech ece eee embedded systems@ srcembedded solutions- hyderabad. web:www.srcembedded.com, ph-8297 313 858 mail:srcembedded@gmail.com

1. DIGITAL CONTROL FOR HOME LIGHTING SYSTEMS WITH
ZIGBEE COMMUNICATION
Introduction:
The Embedded Technology is now in its prime and the wealth of knowledge available is
mind-blowing. Embedded technology plays a major role in integrating the various functions
associated with it. This needs to tie up the various sources of the department in a closed loop
system. This proposal greatly reduces the manpower, saves time and operates efficiently without
human interference. This project puts forth the first step in achieving the desired target. With the
advent in technology, the existing systems are developed to have in built intelligence.
Existing system:
As more and more home appliances and consumer electronics are installed, residential
energy consumption tends to grow rapidly. A large number of home devices increase power
consumption. The reduction of standby power is greatly necessary to reduce the power to the
device controlled here in this project application.
Proposed system:
In this project, we are developing digital control for home lighting systems with WSN
network. Here using PIC microcontroller, RTC, LCD, zigbee wireless and driver to operate
electrical devices. In this microcontroller to used to know the On/Off status of electrical devices
and display in the LCD and are transmitted to the control section. The architecture of digital
control system for home lighting system includes primary Embedded light controller, sensors
that combine with zigbee modules, a MCU, and Current detecting circuit. The user can choose a
function “On/Off,” “Schedule,” “Dimming,” “Automatic” from the PC. The system software is
based on VB.Net.

2. The On/Off function is going to make the devices switch on or switch off both the device.
The schedule function is going to schedule when the devices are switched on and when the
devices are switched off both the device on the time basis. The Dimming function is allotted for
the LED array; to make it reduces the brightness of the LED array. Dimming function depends
upon the luminescence of the light. Luminescence is measured through Photo detector. The
Luminescence values are set through PC using Zigbee.
The Automatic function makes the controller itself to decide how much light is required
in the place through photo detector.
Block Diagram:
Home Section:
2.4GHZ
Power
Supply
100
80
ZigBee
Transceiver
PIC
60
Micro
0
East
West
40
16F877A
20
LCD
Photo
Detector
North
Driver
Circuit
1st Qtr 2nd Qtr 3rd Qtr 4th Qtr
Incandescent
Bulb
Controller
Driver
Circuit
LED
Array

3. Control section:
Power
Supply
2.4GHZ
100
80
Micro
60
ZigBee
Transceiver
40
Controller
20
AT89C51
East
West
MAX
232
North
PC
0
1st Qtr 2nd Qtr 3rd Qtr 4th Qtr
Hardware Requirements:
1. AT89C51 microcontroller
2. PIC 16F877A Microcontroller
3. ZigBee Transceiver
4. LCD Display
5. PC with .Net
Software Requirements:
1. Embedded C
2. MP Lab or CCS Compiler
Application:
1. Can be used in highly energy needed area like government office, IT parks, atomic
stations etc.

4. Advantage:
1. Avoid manpower
2. Low cost
3. Easy maintenance