Electronics 2000

i want to know the principle of infrared sensor and tv remot,
which kind of signals a tv remot transmit?
which kind of encoding there in tv remot?
how the sensor react or how can i differentiate the incoming signals to perform the different tasks,
basically i want to make a project i can operate four different moters or turn on four different LEDs using a tv remot and infrared sensor .

plz help me out , i am waiting for reply .

Infra-red remote controls, as the name suggests, emit an infra-red light which is sensed by the equipment being controlled. Most remote controls transmit data using a standard protcol such as RC-5; the data to be transmitted is modulated onto a carrier frequency. You can purchase ICs to encode / decode IR signals, or a microcontroller can be used with suitable programming.

You can find lots more information of the net, perhaps a starting point is Wikipedia - http://en.wikipedia.org/wiki/Remote_control.

thank you very much