IR MUSIC TRANSMITTER AND RECEIVER

Batch no:21G.J.S Pavan kumar(09MD1A0417)

D.Babji(09MD1A0411)P.Hanumantharao(10MD5A0403)

Project Guide: B.S.S Vidya

contents

What’s the inspiration? Introduction Transistor circuit Receiver circuit Basic electronic components Um 66 Ic Led Photo transistor&Ir emitter Power amplifier LM386&Amplifier 741 Advantages and disadvantages Applications Future scope

WHAT’S THE INSPIRATION?

Now-a-days everything in this world is getting wireless. Infrared rays’ transmission is one of the most important ways of wireless communication. •According to the infrared communication, for a distance of about 1 m from a communication object the communication can be performed without performing connection via a cable, and the like, which is convenient for use, and which provides an advantage that the communication can be realized with a simple constitution as compared with the communication using radio waves.

INTRODUCTION

•Using this circuit, audio musical notes can be generated and can be heard up to a distance of 10 meters.• The receiver can be placed at a maximum distance of 1 meter from the transmitter without any considerable noise interference.• However the communication distance can be improved by using Far IR LEDs. •The range of communication can be increased to about 250 meters by using Far IR LEDs.• This project emphasizes the way by which music is generated and driven by IR rays and gives an explanation to the one of the methods of receiving IR rays without considerable noise interference

Transmitter circuit

Receiver circuit

BASIC ELECTRONIC COMPONENTS

•All components used in electronic circuits have three basic properties, known as resistance, capacitance, and inductance. •Resistance: The property of a component to oppose the flow of electrical current through itself. •Capacitance: The property of a component to oppose any change in voltage across its terminals, by storing and releasing energy in an internal electric field.  •Inductance: The property of a component to oppose any change in current through itself, by storing and releasing energy in a magnetic field surrounding itself.

Um 66 tXXl

IC UM 66 MUSIC GENERATOR

•This is the simplest ever musical calling bell that can be easily built. •It uses the musical 3 pin IC UM66 and a popularly known Transistor BC548b. •Here the musical IC UM66 generates the music when it receives supply and drives a small speaker through a class c amplifier using silicon transistor BC547.

PRECAUTION POINTS FOR IC UM 66

UM66 Never connect the IC in reverse supply connection.• The music depends on the part number of the IC.•The transistor are should be connected in proper pin configuration. •The recommended power supply is battery of 3 volt..

LED

PHOTOTRANSISTOR

INFRARED EMITTER AND DETECTOR

LOW VOLTAGE AUDIO POWER AMPLIFIER LM 386

The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation. 

DYNAMIC LOUDSPEAKER

The loudspeakers are almost always the limiting element on the fidelity of a reproduced sound in either home or theater. The other stages in sound reproduction are mostly electronic, and the electronic components are highly developed. The loudspeaker involves electromechanical processes where the amplified audio signal must move a cone or other mechanical device to produce sound like the original sound wave. This process involves many difficulties, and usually is the most imperfect of the steps in sound reproduction. Choose your speakers carefully. Some basic ideas about speaker enclosures might help with perspective.

APPLICATIONS :

•AM-FM radio amplifiers •Portable tape player amplifiers •Intercoms TV sound systems •Line drivers •Ultrasonic drivers• Small servo drivers •Power converters 

ADVANTAGES & DISADVANTAGES

ADVANTAGES: •Highly sensitive •Two stage Gain control• Very low noise •Low cost and reliable circuit •Can transmit up to 10 meter

DISADVANTAGES

•Not for long distance• work in fixed range• Noise if object between transmitter and receiver 

CONCLUSION

IR ray communication is very easy to understand and simple to implement. It finds various applications in short distance field of communications. It is one of the best ways of building wireless gadgets 

FUTURE SCOPE

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 process which is soon going to rule the world of gaming.