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Thread: iam getting teased by my RF TX AND RX

  1. #1

    Default iam getting teased by my RF TX AND RX

    ok let me explain your very eloborately see these pictures these are my rf tx and rx ciruit on which i have been working


    my problem is " iam not able to understand what my problem is "

    when i try to transmit data from my tx im not able to recieve it

    i have well boarded my circuit

    these are the readings i observed

    AT TX(HT12E);


    DOUT; keeps changing between 2.5 and 4v
    ALL DATA PINS(10-13);reading 0.25v(i mean i left open them intially)

    AT RX(HT12D);

    DIN; keeps changing (supply 9v)
    ALL DATA OUT PINS; reading zero when i press any switch at the tx the dataout of all pins read 0.4v

    ok now say am i not getting teased really

  2. #2
    Administrator T-1000 rao's Avatar
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    Looking at how many problems you are facing with those two IC's, I think we should dedicate a separate forum section to you.

  3. #3

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    Quote Originally Posted by rao View Post
    Looking at how many problems you are facing with those two IC's, I think we should dedicate a separate forum section to you.
    man dont try to joke at me

    just suggest if you r capable okk

  4. #4
    Administrator T-1000 rao's Avatar
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    Did you ground all the address pins on the HT12 E? I will get back to your attitude and your spam habits once I help you solve this problem.

  5. #5

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    Quote Originally Posted by rao View Post
    Did you ground all the address pins on the HT12 E? I will get back to your attitude and your spam habits once I help you solve this problem.
    i have well boarded up my circuit nothing fault

    what d u mean by spam habits what are u trying to say

  6. #6
    Administrator T-1000 rao's Avatar
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    I asked you if you have grounded all the address pins on HT12E? This is because , if you have grounded all address pins on the HT12D, then its mandatory to ground all address pins on the HT12E or the addresses wont match.

    Also , what exactly do you mean by "well boarded"? because the HT12E circuit that you have posted in your first post doesnt have the address pins grounded.

  7. #7

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    Quote Originally Posted by rao View Post
    I asked you if you have grounded all the address pins on HT12E? This is because , if you have grounded all address pins on the HT12D, then its mandatory to ground all address pins on the HT12E or the addresses wont match.

    Also , what exactly do you mean by "well boarded"? because the HT12E circuit that you have posted in your first post doesnt have the address pins grounded.
    yes i have grounded all adress pins in both ht12e and ht12d

    " well boarded " i mean i have well connected the circuit on bread board thats all and i have also made vt pin low

    i just want a verification of those readings

    are they usual or they occur when the ic's damaged

  8. #8
    Super Moderator T-1000 docel's Avatar
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    You cant 'LOW' the VT pin.

    This is what happens when you try to string 2 internet circuits together without knowing the details of the components in detail.

    Check the Datasheets and study it carefully. There is a mistake in your circuit.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  9. #9
    Senior Member Cyborg
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    Look at bottom side link of this site ,
    http://www.rentron.com/PicBasic/RemoteControl.htm

  10. #10

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    Quote Originally Posted by docel View Post
    You cant 'LOW' the VT pin.

    This is what happens when you try to string 2 internet circuits together without knowing the details of the components in detail.

    Check the Datasheets and study it carefully. There is a mistake in your circuit.
    no yar i hav well read the data sheet in order to make the transmission enable the pin TE should be made low its true i think so

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