receiver can not receive signal


Closed Thread
Results 1 to 2 of 2
  1. #1
    nicolelawsc's Avatar
    nicolelawsc Guest

    Unhappy receiver can not receive signal

    help me!!plea..se...
    i am facing a problem in the rf receiver,my receiver is FM-RX1-433A
    the chips i use is pic16f84a.
    can someone help me to take a look on it?for my receiver pin
    pin 1 connect to antenna
    pin 2 connect to ground
    pin 3 is DETECT connect to portB.3
    pin 4 connect to ground
    pin 5 connect to Vcc
    pin 6 is AF,FM demodulator output--i left it unconnect
    pin 7 connect to portB.0
    Below is my code:

    INCLUDE "modedefs.bas"
    DEFINE OSC 4

    INPUT portb.0
    INPUT portb.3
    OUTPUT portb.1
    OUTPUT portb.2

    led1 VAR PORTB.1
    led2 VAR PORTB.2

    Loop:

    SERIN PORTB.0,N2400,["A"],portB.3
    IF portB.3=1 Then l
    GOSUB led_on
    ELSE
    GOSUB led_off
    ENDIF
    GOTO loop

    led_on:
    High led1
    Low led2
    PAUSE 5000
    LOW led1
    RETURN

    led_off:
    Low led1
    High led2
    PAUSE 5000
    LOW led2
    RETURN


    End



    and for the antenna, i am using the type like antenna of normal radio.is it another cause??if this is the problem,do u hv any better suggestion?

    below is the link of the receiver datasheet that i used.

    http://my.farnell.com/jsp/endecaSear...&Ntk=gensearch


    Thank you for your consideration

  2. #2
    Join Date
    Oct 2003
    Location
    Australia
    Posts
    257


    Did you find this post helpful? Yes | No

    Default

    Nicolelawsc,

    This is a pretty old post, but just in case your still want another crack at it....

    I got these to work very well. If your transmitter is a TXC1 or similar, they should work fine with any old bit of wire for antenna (paper clip....) or no antenna at all if they are a couple of inches apart.

    I found it very useful to use an oscilliscope (CRO) so you could see the data coming into the transmitter, and at the RX output pin. Without one of these your pretty much waisting your time.

    Also, start with a slower Baud rate, say 600 or 1200 so you can see what is going on.
    When you can send basic serial data ok... try using some different error correction techniques.... that's were the fun really starts.

    Cheers
    Squib

Similar Threads

  1. PBP code to read R/C signal from receiver
    By malc-c in forum mel PIC BASIC Pro
    Replies: 9
    Last Post: - 28th October 2009, 21:51
  2. PIC16F684 + LCD to use the 256bytes of EEPROM - HELP
    By xnihilo in forum mel PIC BASIC Pro
    Replies: 3
    Last Post: - 7th March 2008, 14:19
  3. DMX on 250000 baud receive
    By syscoder in forum mel PIC BASIC Pro
    Replies: 16
    Last Post: - 19th November 2007, 09:50
  4. Help with sound command in 2 programs
    By hyperboarder in forum mel PIC BASIC Pro
    Replies: 4
    Last Post: - 5th July 2007, 20:36
  5. receiver can not receive proper signal
    By nicolelawsc in forum mel PIC BASIC Pro
    Replies: 3
    Last Post: - 1st March 2006, 02:51

Members who have read this thread : 1

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts