IR MUSIC TRANSMITTER AND RECEIVER

CH.NAGA SAI KRISHNA - 09881A0477

K.SRAVAN KUMAR - 09881A0498

PRESENTED BY,

UNDER THE GUIDANCE OF:S.SRINIVAS

Assistant ProfessorDepartment of ECE

INTRODUCTION

THE THEME

The main idea behind this project is to generate

musical notes using Infra-Red Radiations(IR). Musical

notes can be transferred from the transmitter section

to the receiver section using the IR rays and thus this

circuit can be implemented in wireless music systems,

mobile devices and the Closed Circuit -cameras.

THE INFRA-RED RAYS

THE ELECTRO MAGNETIC SPECTRUM

FREQUENCY : 300 GHz – 450 THz WAVE LENGTH : 750nm – 1mm

THE PRACTICAL APPLICATIONS OF IR RADIATIONS

THERMAL IMAGING NIGHT VISION EQUIPMENT ASTRONOMY

INFRA-RED COMMUNICATION

MELODY GENERATOR – UM66

UM-66 is basically a ‘MELODY’

integrated circuit.

The IC UM-66 generates musical

notes whenever supply is given to it

and drives a speaker via a

transistor or a simple resistor.

The melody is stored in a 64-bit

ROM in the form of ‘Beats’ and

these beats are transmitted when

the supply is given.

Used to construct call bells, simple

musical gadgets, toys etc.

MELODY GENERATION USING UM-66

MELODY GENERATOR CIRCUIT

THE CIRCUIT DIAGRAM

THE TRANSMITTER SECTION

THE CIRCUIT DIAGRAM

THE AUDIO RECEIVER SECTION

THE OPERATION OF THE CIRCUIT

• The circuit can be divided into two parts: IR music

transmitter and the receiver.

OPERATION OF TRANSMITTER SECTION:

The output of IC1 is fed to the IR driver stage (built

across the transistors T1 and T2) to get the maximum

range

Here the red LED (LED1) flickers according to the musical

tones generated by UM66 IC.

For maximum sound transmission these should be

oriented towards IR phototransistor L14F1 (T3).

. 

THE OPERATION OF THE CIRCUIT

• THE RECEIVER SECTION

The IR music receiver uses popular op-amp IC µA741 and

audio-frequency amplifier IC LM386 along with

phototransistor L14F1.

The gain can be varied using potmeter VR1.

The output of IC µA741 is fed to IC LM386 (IC3) via capacitor

C5 and potmeter VR2.

Potmeter VR2 is used to control the volume of loudspeaker

LS1 (8-ohm, 1W).

THE APPLICATIONS

WIRELESS MUSIC SYSTEMS

CLOSED CIRCUIT CAMERAS SIMPLE MOBILE GADGETS

X-10 POWERMID RECEIVERS AND TRANSMITTER IR REMOTE CONTROL

ADVANTAGES AND DISADVANTAGES

ADVANTAGES

• Highly sensitive

• Two stage Gain control

• Very low noise

• Low cost and reliable circuit

• Can transmit up to 10 meters

DISADVANTAGES

• Not suitable for long range transmission

• Noise if there are obstacles between the transmitter and

receiver.

CONCLUSIONS

• The IR-Communication finds various applications in short distance field of communications.

• It is one of the best ways of building wireless gadgets.

• In future there is scope of building virtual environment using the principles of IR ray transmission and reception.

•  Virtual gaming which also employs IR reception techniques is still in research processes which is soon going to rule the gaming world.

QUERIES…???

THANK YOU..!