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:
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:
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.
Source Code :
This Project is Made By
Umer Anjum AND M Suleman Khan Department of Applied Physics Karachi University
1 comment
Interesting post.