The transmitter sends out an electromagnetic wave, This wave is broken into short pulses to send a digital signal, often Binary.The receiver has a tuned circuit which selects out the required Rf signal and further circuitry decodes the digital signal into an instruction.Most controllers eg TV controller are actually infra red - look at the front i there is a window or LED it's Infra red.If it is a car type remote it's wireless - See top answer.http://www.howstuffworks.com/remote-entry.htm
i need to make an rf remote controling device how to start it i mean how can i build my own transmitter and reciver
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The transmitter sends out an electromagnetic wave, This wave is broken into short pulses to send a digital signal, often Binary.
The receiver has a tuned circuit which selects out the required Rf signal and further circuitry decodes the digital signal into an instruction.
Most controllers eg TV controller are actually infra red - look at the front i there is a window or LED it's Infra red.
If it is a car type remote it's wireless - See top answer.
http://www.howstuffworks.com/remote-entry.htm
i need to make an rf remote controling device how to start it i mean how can i build my own transmitter and reciver