WK214
Title of the project
:
Automatic Intelligent Room Light Controller using
Domain
:
Embedded Systems Design
Software
:
Embedded C, Keil, Proload
Microcontroller
:
AT89S52
Power Supply
:
+5V, 500mA Regulated Power Supply
Display
:
LCD
LCD
:
HD44780 16-character, 2-line (16X2)
LED
:
5mm
Crystal
:
11.0592MHz
Sensor
:
IR Sensors
Developed By
:
M/S Wine Yard Technologies
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073
Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
89S52 MCU with auto door opening/closing
WK214
WITH AUTO DOOR OPENING/CLOSING
In this competitive world and busy schedule human cannot spare time to perform
his daily activities manually. The most common thing that he forgets to do is switching
OFF the lights wherever they are not required. This project is a standalone automatic
room light controller with auto door opening and closing. The main aim of the project is
to control the lighting in a room depending upon lighting that is present in the room. Use
of embedded technology makes this closed loop feedback control system efficient and
reliable. Micro controller (AT89S52) allows dynamic and faster control. Liquid crystal
display (LCD) makes the system user-friendly. AT89S52 micro controller is the heart of
the circuit as it controls all the functions.
The system comprises of two IR Transmitter-Receiver pairs, one of which is
located in front of the door outside the room. The other pair is located inside the room.
LDR is placed outside the room and is used to identify whether it is day or night time.
Initially the light is switched off in the room. Whenever a person tries to enter into the
room, the receiver of first IR pair identifies the person. Then the microcontroller opens
the door by rotating the stepper motor. After the person had entered into the room
completely, the door will be closed automatically.
The light is switched off even if anyone is present inside the room during the day
time. Similarly, the light is switched off if no one is there inside the room or if it is night
times. Thus, depending on the intensity of light and the surrounding temperature, the
required action is performed by the microcontroller. LCD displays the number of persons
present inside the room.
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073
Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
CONTROLLER USING 89S52 MICROCONTROLLER
AUTOMATIC INTELLIGENT ROOM LIGHT
WK214
This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage
the ac out put of secondary of 230/12V step down transformer.
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073
Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify
LCD
DISPLAY
IR Tx-Rx
SENSOR
PAIR
IR Tx-Rx
SENSOR
PAIR
89S52
CRYSTAL
ULN
DRIVER
RESET
CIRCUIT
RELAY
Step
down
T/F
Bridge
Rectifier
Filter
Circuit
STEPPER
MOTOR
LDR
SENSOR
Regulator
Power supply to all sections
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073
Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
Block Diagram: Automation of unmanned railway gate control system using 89S52
microcontroller
WK214