Is this Circuit Right?

[Dragon Tamer]

The transmitter and receiver don't need to be any kind of a coded signal, you can just have an IR LED and an IR NPN photo-transistor. Just connect them to your voltage supply and have the current flowing into them limited appropriately. If you're having problems with your photo-transistors picking up a lot of stray IR from sunlight and what not, color your receiver red, and put it into a tube (a paper one is good enough, as long as it's black inside) and make the tube about 1" long.

 

[Electroenthusiast]

The transmitter and receiver don't need to be any kind of a coded signal, you can just have an IR LED and an IR NPN photo-transistor. Just connect them to your voltage supply and have the current flowing into them limited appropriately. If you're having problems with your photo-transistors picking up a lot of stray IR from sunlight and what not, color your receiver red, and put it into a tube (a paper one is good enough, as long as it's black inside) and make the tube about 1" long.

OK,
but when i use IR LED and Phototransistor, there is a probability of receiver receiving IR RAYS from other IR LED(different) .
I'm using 3 IR LED's and 3 RECEIVERS, wont there be any problem?

 

[Electroenthusiast]

But that is not the case now.
Microcontrollers are the first thing you look at when designing a circuit.
Even the $2.00 whistle keyfinder is designed around a micro and the $3.00 cell phone charger that uses a single cell to produce 5v is a 3 pin microcontroller!
Any school that doesn't teach micro's is not worth attending.

I Understand, i'll try doing it!!!
I'm determined in finishing the project,
that too last day for project submission is nearing.

 

[Dragon Tamer]

OK,
but when i use IR LED and Phototransistor, there is a probability of receiver receiving IR RAYS from other IR LED(different) .
I'm using 3 IR LED's and 3 RECEIVERS, wont there be any problem?

No if you do the same thing to the IR LED's that you do/did to the IR phototransistor, it's esentialy like a low powered laser of sorts, there is no interference at all.