IR Remote Control Relay Help ???

Discussion in 'General Electronics Chat' started by HaseebEngineer, Aug 25, 2013.

  1. HaseebEngineer

    Thread Starter New Member

    Aug 8, 2013
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    This is the circuit I have made, but i dont know why it doesnt work ... Please tell me whats the problem in it :( ...
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,532
    2,369
    One primary rule when something doesn't work or fails, is logical trouble shooting, IOW take a stage at a time starting with the input and perform voltage tests with circuit activated and de-activated.
    Also you will learn alot more than someone telling you what might be wrong!
    Max.
     
    Last edited: Aug 25, 2013
  3. HaseebEngineer

    Thread Starter New Member

    Aug 8, 2013
    22
    0
    I have checked twice, the connections are okay ... but it just doesn't respond to the remote signal ... both my transmitter and receiver is 38KHz ... I just can't figure out
     
  4. Shagas

    Active Member

    May 13, 2013
    802
    74
    What is the wavelength of your transmitter diode ?

    Check your circuit again , poke your DMM /oscillosope around and check if you are seeing what you should see on each junction .

    Identify the problem : Is the the reciever stage? Is there an output on it ?
    Is it the CD4017 thats the problem ? etc
     
  5. Shagas

    Active Member

    May 13, 2013
    802
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    Oh another thing ... What is your transmitter transmitting ? Besides the 38khz carrier?
     
  6. tubeguy

    Well-Known Member

    Nov 3, 2012
    1,157
    197
    Look closely at the connections to the relay coil.
     
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  7. HaseebEngineer

    Thread Starter New Member

    Aug 8, 2013
    22
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    I am using a TV Remote Control ...
    Today i remake the circuit and now i see that when i press the button on the remote the relay stops and starts again with in a second ... like a tick tock ... everytime i transmit a signal the led connected to the relay turn off and on like a seconds hand on the clock ... :(
     
  8. pavans2510

    New Member

    Aug 27, 2013
    3
    1
    Try replacing .01uF capacitor with higher capicitor value.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,532
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    Ah a shorted transistor unless the diode connection is a typo?
    Max.
     
  10. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,030
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    Can a mechanical relay really keep up with the data signal passed by a tv remote?
     
  11. Shagas

    Active Member

    May 13, 2013
    802
    74
    You have probaly misunderstood how these TSOP recievers work .
    You don't just send it a LOW or a high and expect it to latch .
    If i'm not mistaken the output just sits at 5volts and they need an alternating signal to give an alternating output .
     
  12. wayneh

    Expert

    Sep 9, 2010
    12,106
    3,038
    Right, most of them detect a carrier and activate, then deactivate after a second or two. Somewhere RB advised of one that latches whenever the carrier is detected. I forget but maybe it will show up in a search of these forums.
     
  13. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    The reverse-EMF diode on the relay coil appears to be connected backwards.
    What is the current requirement of the relay coil?
     
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