how can i manually control a 220v RF relay

Discussion in 'The Projects Forum' started by speebman, Jun 22, 2016.

  1. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    hey all
    i'm working on a project that involves a small rf relay that can be controlled by a rf remote controll
    i bought it on aliexpress
    it work great, but now my project evolved and i need to find a way to turn the relay ON
    without the remote control, only ON.

    any suggestions on what circuit do i need to momentarily shorten to get the relay to become ON?

    i can provide better pic's if needed

    983288647_500.jpg 983300608_392.jpg
     
  2. Marley

    Member

    Apr 4, 2016
    144
    40
    The RF signal is normally coded so that interfering signals do not randomly switch the relay. This code is recognised by an on-board micro-controller.

    So, it is not possible to to do what you want without re-programming the on-board micro-controller. Which will likely be impossible!
     
  3. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    i agree, but..... :)
    the coding is on the rf receiver side, the relay circuit just gets a simple single from the rf module to
    open or close.
    this relay is basically 2 modules, RF receiver that is attached to the relay module
    if i can just find a place to short-circuit on the relay module, i think it will work

    but hey, im not a electronics engineer so...
    hope for the best


    danny
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    Just put a switch on the receiver that powers the coil, there is more than likely a transistor Q1 that powers the relay.
     
  5. ScottWang

    Moderator

    Aug 23, 2012
    4,854
    767
    If what I thought was right then you can take the input signal away (keep the resistor of the base of npn transistor), and connecting the pin of resistor to the 12V and then it will drive the relay to works.
     
  6. Sensacell

    Well-Known Member

    Jun 19, 2012
    1,130
    266
    Just provide another relay or switch that shunts the contacts? No mods necessary.
     
  7. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    thanks for the replays
    but can somebody direct me to over the image? to what needed to be shorten?
     
  8. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
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    If you take close up pictures of the relay track side and component side, we can direct you better.
     
  9. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    thanks, a made as many as a could
    if you need more, or something spesific, just tell me ill take a photo
    IMG_20160623_173011.jpg IMG_20160623_173043.jpg IMG_20160623_173057.jpg IMG_20160623_173108.jpg IMG_20160623_173125.jpg IMG_20160623_173147.jpg IMG_20160623_173158.jpg IMG_20160623_173213.jpg IMG_20160623_173223.jpg IMG_20160623_173244.jpg
     
  10. dannyf

    Well-Known Member

    Sep 13, 2015
    1,810
    362
    I have no idea what "turn a relay ON" means. Closed? Open?

    If you want the relay to be closed,

    1) you can simply wire the 220v side directly, by-passing the whole thing; or
    2) you can hard-wire the coil so that the relay is always energized.
     
  11. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    the relay has a starting position NO or NC
    after you press a button on the transmitter remote the relay switches from NC -> NO an vice versa
    im trying to find a way to make the rely board think that it got a signal from the transmitter to activate the relay without really using the transmitter


    danny
     
  12. ScottWang

    Moderator

    Aug 23, 2012
    4,854
    767
    I already told you that on #5, if you still don't get it then you can draw the circuit from relay and transistor and its Rb.
     
  13. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    yes, but it will make the relay work momentarily, when i remove the connection from the ressitor to the relay
    the relay will switch back to his original state
    and i need it to stay in NC state until i push the off button on the transmitter


    danny
     
  14. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    So what you need is a flipflop using a 555 timer chip like this......
    555-flip-flop.gif



    make the bulb your relay.
     
  15. speebman

    Thread Starter New Member

    Jun 22, 2016
    9
    0
    i think i wasn't understood
    i will use the transmitter (remote with OFF and ON butn) and i need it

    but

    i also want to be able to use the rf relay without it say, manual mode
     
  16. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    Then just short the relay contacts out or power the coil with 12v,...
     
  17. dannyf

    Well-Known Member

    Sep 13, 2015
    1,810
    362
    Just exactly are you trying to do?

    Sounds like you want to control the relay manually and (or?) via the rf remote? If the two commands conflict with each other, how should the circuit do?
     
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