Thanks to our Course TeacherRethwan Faiz

Assistant Professor Faculty of Engineering, AIUB

Name IDMUKUL HABIBUR RAHMAN 13-24087-2

MORSHED MIR MD. NEWAZ 13-24078-2

HASANUZZAMAN KAZI 13-24511-2

CHOWDHURY SHER HAIDER 13-23941-2

BHATTACHAJEE SHANTANU 13-24674-2

Group Members:

Infrared Remote control was developed in late 1970’s

It uses infrared light and photo receptors and it sendsdigitally-coded pulses of infrared radiation to controlfunctions such as power, volume, temperature and manymore.

It uses different light frequencies for different functions.

How they work???

Light is sent out by remote control and is received by phototransistor which is connected with Microcontroller.

They receive signals and transmit signals to device via radio wave.

5V regulator LM7805

Infrared sensor (TSOP1738)

Microcontroller AT89S52

PIC12F675

EEPROM

Opto-isolator TRIAC driver

Dimmer IC

TRIAC

16x2 Alphanumeric LCD

LM7805

It is a regulated power supply IC

TSOP173

TSOP module is used for amplifying the

coded pulses from the IR transmitter

PIC12F675

It has program inbuilt to decode

TV remote signals

EEPROM 24C16

It’s stored memory is non-volatile

Microcontroller AT89S52

8K Bytes of In-System

Reprogrammable Flash

Memory

256 x 8-bit Internal RAM

32 Programmable I/O Lines

Two 16-bit Timer/Counters

Low-power Idle and Power-

down Modes

TRIAC Driver Dimmer IC

TRIAC BTA12 LCD

Easy to interface with microcontroller

and used in 4 bit mode

MOC3021 is optically isolated

TRIAC driver device

Dimmer IC is also a programmed

microcontroller

TRIAC is a switching device

Circuit Description

The remote we use, sends a train of bits (0’s and 1’s) of some fixedlength modulated with a 38 KHz infrared signal

The demodulated signal from TSOP sensor is fed to pin no. 2 of ICPIC12F675

The decoded signal from PIC 12F675 is fed to pin no. 10 (port 3.0)RXD (serial input port) of AT89S52

Now microcontroller have a simple program that turns ON switchif OFF and vice-versa

TRIAC and opto-isolators are used for switching of the devices

EEPROM is used to write the current status on LCD

Flow chart of program

Application and Advantage

For Disabled person

Any School and Colleges

In Shops

For a patient

This system reduces human efforts and makes life a bit easy

Using this system one can also set time

Conclusion

This project gives an idea about working of a sensor and

Decoder circuitry.

This project can be used anywhere either at home or offices

Future Work

Due to use of Microcontroller the work presented in this project

can further be extended for web interfaced control application

using Ethernet module like ENC28J60, RTL8019 etc.

References & Books

[1] Finney D., The Power Thyristor and its Applications, p. 35, Toronto,

McGraw-Hill Book Company Limited, 1980.

[2] Mahmud S. A., Murtala B. Z. A., Kolo J.G., Leonardo Journal of

Sciences, 11, p. 41-50, 2007.

[3] Remote Control System RC-5 Including Command Tables, Philips

Semiconductors, December 1992, Publication No. 9388706 23011

[4] Delgado, A. R., Picking, R., & Grout, V. (2006) Remote-controlled

home automation systems with different network technologies.

Proceedings of the 6th International Network Conference (INC 2006),

University of Plymouth, 11-14 July 2006, pp. 357-366.

[5[ Muhammad Ali Mazidi, Janice Gillespie Mazidi & Rolin D. McKinley

“8051 Microcontroller and Embedded Systems”, 2006

[6] Kenneth J. Ayala, “The 8051 microcontroller” 2008

Thank you