Dish position control using Geared Motor

DRK College of Engineering & Technology
DISH POSITIONING CONTROL BY GEARED MOTOR
Project- SeminarDate: 19-APR-2012
Department of Electronics & Communication Engineering
By
K.LAXMI KANTH (08U51A0487)
G.NITHIN (08U51A0479)
K.N.DIVYA SREE (08U51A0486)
N.MANOJ (07U51A0460)

INTRODUCTION
Aim : To move the dish in the desired direction to receive
the maximum signal.
 Purpose : To reduce the complexity in adjusting the position
of dish.

BLOCK DIAGRAM

HARDWARE COMPONENTS:
POWER SUPPLY
AT89S52 MCU
IR TRANSMITTER
 TSOP (RECEIVER)
GEARED MOTOR
L293D MOTOR DRIVER IC

POWER SUPPLY
230 V AC
50 Hz
5V
DC
5v RegulatorBridge rectifier


IR TRANSMITTER(LED):
•Peak Wavelength 940 nm
•Spectral Bandwidth 45 nm
•Max Current: 100 mA
•Forward Voltage 1.4V-1.5V
•Power Dissipation 150 mW
•Breakdown Voltage 5V

TSOP 1738 PIN DIAGRAM


Photo detector and preamplifier in one package
 TTL and CMOS compatibility
 Output active low
 Low power consumption.
TSOP 1738 FEATURES :


TSOP SPECIFICATIONS:
•Supply Voltage: –0.3 to 6.0 V.
•Supply Current: 5 mA.
•Output Voltage: –0.3 to 6.0 V.
•Output Current: 5 mA.
•Operating Temperature Range: –25 to +85°C


RC-5 Protocol:
2 start bits,1 toggle bit,5 bit address and 6 bit command
Carrier frequency of 36kHz
Constant bit time of 1.778ms (64 cycles of 36 kHz)
Manufacturer Philips


Typical pulse train of RC-5 message


GEARED MOTOR:
Principle
Working
Applications


L293D MOTOR DRIVER IC:
Wide supply-voltage range: 4.5V to 36V
Separate input logic supply
Internal ESD protection
Output current 600 mA
 It can drive two motors in both clockwise and anti-clockwise
direction


PIN DIAGRAM OF L293D


INTERFACING OF MOTOR WITH L293D :

MICROCONTROLLER(AT89S52)
• 4.0V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 33 MHz
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters

Pin Configurations of AT89S52


SCHEMATIC DIAGRAM:

SOFTWARE:
•ASSEMBLY LANGUAGE
•KEIL MICRO VISION


Applications:
 The position of dish is used in DTH were the
signals are received directly from satellite.
The dish position control system is used on the top
of cars where the media access signals.
 The position of antenna is used in GPS tracking
system.


Future scope:
Positioning of dish can be implemented using RF means where
the dish position can be adjusted very efficiently.
 Using RF transmission the dish position can be controlled from a
distance of 200meters.


Conclusion:
The position of the dish is controlled by using the IR
means i.e., using remote control the position of dish is
adjusted with the help of geared motors to get the
maximum reception of signal.


THANK YOU

Dish position control using Geared Motor

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