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You are here: Home / Topics / RF Transmitter and receiver

RF Transmitter and receiver

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Microcontroller › 8051 › RF Transmitter and receiver

  • This topic has 6 replies, 5 voices, and was last updated 12 years, 9 months ago by AJISH ALFRED.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • July 30, 2012 at 6:20 pm #1894
    visvanathan R
    Participant

     

    How to transmit and receive the signal in RF Module and how its working?. if i use multiple transmitter and one receiver then can i receive the all transmitter signal at  same time in  receiver. 

    August 4, 2012 at 6:53 pm #8396
    MASTER MOHIT
    Participant

    SIR,
    I HAVE ALSO THE SAME PROBLEM I AM NOT GETTING WHAT TO START AND HOW TO START ??? CAN U HELP ME ?? PROBVABLY BY NOW U HAVE FOUND OUT THE SOLUTION ??
    THANK U SIR

    August 6, 2012 at 6:51 am #8407
    Amrith
    Participant

    You can use microcontroller to interface RF transmitter & receiver. The other way is, use Encoder & Decoder IC to transmit & receive data. You can use multiple transmitters & single receiver but it is not possible that receiver will receive all the data at same time, you need to maintain some delay between each transmission.

    August 6, 2012 at 6:55 am #8408
    Amrith
    Participant

    Hi,

    You can use microcontroller to interface RF transmitter & receiver, the other way is to use RF encoder(HT12E) & decoder(HT12D) IC’s to communicate with RF modules.

    You can use multiple transmitter & one receiver but it is not possible that the receiver will receive all the transmitted data frommultiple transmitters at the same time.you need to maintain some delay after each transmission. 

    August 6, 2012 at 7:16 am #8409
    Lui Yat Ming
    Participant

     

    Hi,Amrith,

     

    I use Hyperterminal without c code in paper ‘ 

    How to interface computer’s Serial Port (RS232) with 8051 microcontroller (AT89C51) ‘. I do not know why was that?

    Please help!

    Also I do not know the sentance in c code such as P1=value;&

    P2=P1-32; It is for what ?

    Thanks for an explanation.

     

    For more explanation, the Hyperterminal also can type the ‘char’ and display exactly without c code in paper.  

     

    I have sent more information to contact you!, but no reply. 
    August 6, 2012 at 10:08 am #8413
    Amrith
    Participant

    Hi Lui..

    Below is the connection digram to interface 8051 & PC

    wysiwyg_imageupload:5608:height=624,width=543

    August 6, 2012 at 4:39 pm #8418
    AJISH ALFRED
    Participant

    Hi Visvanathan,

    RF modules have in-built circuit to modulate your data and transmit. In receiver side there will be a demodulator also. Normally we have ASK and FSK modules.

    If there are more than one transmitter or receiver in operation at the same time, you should use encoder and decoder. Use HT12D, HT12E pair.

    A single transmitter, multi-receiver configuration is possible, but single receiver and multiple transmitter is impossible unless you implement some kind of a multiplexing scheme like TDMA.

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