Learn How to Control Your Home Appliances by using 4-Channel Infrared Remote transmitter

Objective:

“To make a 4 channel IR Remote Control that can control household appliances”

· This is useful for such people who can’t walk due to any physical disability and also for elderly people.

· We have used an IR remote controlling instead of RF because of a reason that it can be used to operate a television, sound system, DVD players etc meanwhile it can be used to operate different household appliances because IR is a directional phenomenon.

· Whereas RF is non-directional and have many more uses over IR.

Equipment and Components Used:

Contents

1 Equipment and Components Used:
2
3 Transmitter:
4 Description:
5 Source Code :

Transmitter:

· Pushbuttons

· Regulator IC 7805

· PLD (GAL – 16V8)

· Encoder HT 12E

· 555 Timer IC

· AND Gate – 7408

· IR Transmitter LED

· Transistor BC 547

Receiver:

· IR Receiver (T-Sop-1738)

· Regulator IC 7805

· Decoder HT 12D

· PLD (GAL – 16V8)

· JK Flip-flops(7476)

· Relay Switches

· Transistors BC 548

· AC LOAD

Description:

A remote control is Consumer IR device which sends digitally-coded pulses of infrared radiation to control functions such as turning on lights, power, volume, tuning, temperature set point, fan speed, and many other features. Remote control for these devices are usually small wireless handheld objects with an array of buttons (4 in our project) for adjusting various devices; the remote control contains all the function controls while the controlled device itself has only a handful of essential primary controls.

Since infrared (IR) remote controls use light, they require a line of sight to operate the destination device. The signal can, however, be reflected by mirrors, just like any other light source.

If the operation is required where no line of sight is possible, for instance when controlling equipment in another room or installed in a cabinet, many brands of IR extenders are available for this on the market. Most of these have an IR receiver, picking up the IR signal and relaying it via radio waves to the remote control, which has an IR transmitter mimicking the original IR control.

Infrared receivers also tend to have a more or less limited operating angle, which mainly depends on the optical characteristics of the phototransistor. However, it’s easy to increase the operating angle using a matter transparent object in front of the receiver.