how to make an rf remote controller?

how does a rf remote works imean its principle and how to match transmitter and receiver

rickharris4 years ago
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.
avinash reddy (author)  rickharris4 years ago
i need to make an rf remote controling device how to start it i mean how can i build my own transmitter and reciver