ECE 6th Semester 119/03/2010

IR Transmitter and Receiver

ECE 6th Semester 2

Introduction:-

19/03/2010

Most of the IR remotes work reliably within a range of 5 meters. The circuit which we designing uses IR transmitter for reliable operation over a longer range. To double the range from 5 meters to 10 meters you need to increase the transmitted power.

For increasing the circuit efficiency, a MOSFET has been used which acts as a switch and thus reduces the power loss that would result if a transistor is used for switching

ECE 6th Semester 3

Problem Definition :-

19/03/2010

To Prepare a transceiver which is based upon the infrared transmission using IR led’s. The range of the transceiver circuit varies with number of IR led’s used.

ECE 6th Semester 4

Mission:-

19/03/2010

Mission 1 (Reduced) – Fabrication Of the Receiver circuit.

Mission 2 (Completed) – Infrared Transmission Using transceiver.

ECE 6th Semester 519/03/2010

Push To ON Switch

IC 4047(Triggering

IC)

IR LED's(Tx)

IR Rays

Rx Module(TSOP1738)

IC 4047(Triggering

IC)

IC 4017(Counter

IC)

Bistable Mode

Transistor

Application

Transmitter section

Receiver section

Block Diagram :-

ECE 6th Semester 6

Hardware Requirements:-

19/03/2010

Two Power Supplies (either 12V or 9V). Two IC 4047 (triggering IC). One IC 4017 (counter IC for Rx). One receiver Module TSOP1738. IR LED’s Three Transistors. Resistors ranging from 1-10k. One MOSFET BS170. One Push to ON switch.One DC Motor(6V).

ECE 6th Semester 719/03/2010

ECE 6th Semester 8

Transmitter Section:-

19/03/2010

ECE 6th Semester 9

Receiver Section:-

19/03/2010

ECE 6th Semester 10

Transmitter Backup….

19/03/2010

ECE 6th Semester 11

Limitations :-

19/03/2010

1. Since the circuit uses modulated infrared beam for control function therefore light reflections will not affect the circuit operation. However tube lights and CFL lamps may cause malfunctioning of the circuit.

2. The motion of the DC motor is unidirectional that has to be modified.

ECE 6th Semester 12

Current Status of the Project:-

19/03/2010

• Transmitter circuit has been prepared.

• Receiver Circuit will be prepared by next week.

Estimated Cost =

800/-

ECE 6th Semester 13

Application:-

19/03/2010

Automation Sector. Remote controlling of household appliances.

ECE 6th Semester 14

Problems Which I faced….

19/03/2010

Unable to rotate the DC motor in both the direction.

Failed to use the 555 timer IC for triggering the IR LED’s.

Tried applying the polarity concept for bidirectional rotation but by doing this the circuit will become costlier.

ECE 6th Semester 15

Conclusion:-

19/03/2010

The use of IC 4047 family has been finalized for triggering the IR Led’s. I will be using TSOP1738 instead of SFH505A for Receiving the IR rays.

ECE 6th Semester 16

Group details:-

19/03/2010

1.Raj Kumar Mourya(0176ec071039)

ECE 6th Semester 17

References:-Books:-

1. Principles of Electronics By V.K Mehta

Magazines:- 1. Electronics For You 2. Electronics India 3. Digit

Websites:- 1. www.circuitmaker.com 2. www.efy.com 3. www.efyonline.com

19/03/2010

ECE 6th Semester 18

tHANK yOU………..

19/03/2010