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wireless receiver transmitter setup

Discussion in 'General Electronics Discussion' started by gurjant.sandhu33, Dec 18, 2013.

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  1. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    i have a 433 mhz wireless tx rx kit but i am not able to get it working.
    please can any one refer me a circuit.
    the image of kit is attached below.
    and, does it need arduino or pic board to run or can it be used without them.
     

    Attached Files:

  2. BobK

    BobK

    7,682
    1,685
    Jan 5, 2010
    A link to a datasheet might help us answer.

    Bob
     
  3. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    i tried very hard but i was not able to find the datasheet
    but model is- xy-mk-5v
     
  4. BobK

    BobK

    7,682
    1,685
    Jan 5, 2010
    Well, with no information about it, I don't see how anyone can help.

    Bob
     
  5. jpanhalt

    jpanhalt

    426
    4
    Nov 12, 2013
    Googled: xy-mk-5v 433mhz

    Got lots of hits. The first several were related to an Arduino forum. Here is the first one: http://forum.arduino.cc/index.php?topic=129749.0

    Apparently, it is just CW at 433 MHz and does not have any coding ability built in, so you will get lots of interference. One of the other links also sells the HT12E and HT12D to give coding and reduce interference (http://www.ventor.co.in/index.php?main_page=product_info&products_id=261).

    Without an antenna, range will be extremely limited and without some method to code, you will have just one, on/off (when you are lucky) function. By itself, it is probably not suitable for an RC car.

    John
     
  6. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    i am sorry sir that i was not able to give you details about it
     
  7. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    @jpanhalt
    sir i have the encoder(ht12e) and decoder(ht12d) but i was not able to get tx rx working.
    I have also made a pic microcontroller board using PIC16f873.
    can i use the tx and rx with microcontroller
     
  8. jpanhalt

    jpanhalt

    426
    4
    Nov 12, 2013
    Yes, a microcontroller can be used with the TX and RX that you have. That is basically all that the HT12 chips are. Google on software UART.

    However, if you can't get the receiver and transmitter working at all, then adding an additional layer of complexity isn't going to help. Have you checked any of the links to be sure you wired the modules correctly?

    John
     
  9. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    yes i have checked many links but all in vain
    could it be possible that my tx rx are damaged . if so then how can i check that they are working.
     
  10. jpanhalt

    jpanhalt

    426
    4
    Nov 12, 2013
    Yes, it is possible the part(s) are damaged. But it is also likely they are not set up properly.

    Please show us how you set up the RX and TX and what you did to show they are not working. A schematic would help.

    John
     
  11. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    these are the attachments i used.
     

    Attached Files:

  12. jpanhalt

    jpanhalt

    426
    4
    Nov 12, 2013
    Well, if you are sure those are the same pinouts as on the units you purchased, it should work. I have used the ones you show in your post #11. But, are you really sure?

    Please post what YOU did.

    John
     
  13. gurjant.sandhu33

    gurjant.sandhu33

    51
    0
    Dec 10, 2013
    i bought the encoder decoder board from following seller

    http://www.ebay.in/itm/RF-encoder-d..._203&hash=item41731b7895&_uhb=1#ht_1227wt_952

    the decoder board have an led connected to vt pin of ht12d which blinks when the tx is also connected to supply and do not blink other wise.
    so i now think that the tx rx pair must be alright.
    but when i connect 4 leds to data pins of decoder board they are always on.
    and do not turn off even when the four switches connected to the encoder board are pressed.
     
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