Is this Circuit Right?

Dragon Tamer said:

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.

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colin55 said:

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.

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r.vittalkiran said:

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?

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