IR ne555 receiver

Discussion in 'Radio and Wireless' started by NyLODA, Sep 14, 2018.

  1. NyLODA

    NyLODA

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    Hi, everyone. I am trying to build IR relay switch. I am using TSOP 1736 and ne555. I used one 555 as ir reciever and other one in bistable mode as flip flop switch. Everything works fine but sometimes i am getting first 555 false triggered. What can cause that and how i can fix it. I used similar schematic for ir reciever (I used TSOP 1736 instead 1738)as this one:http://gadgetronicx.com/wp-content/uploads/2013/10/receiver.gif
     
    NyLODA, Sep 14, 2018
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  2. NyLODA

    Alec_t

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    Welcome to EP!
    The circuit in the link is a monostable, not bistable.
    The TSOP1736 is for a 36kHz IR signal. What is your IR modulation frequency?
     
    Last edited: Sep 14, 2018
    Alec_t, Sep 14, 2018
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  3. NyLODA

    NyLODA

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    You didn't understand me. In the link is only first part of my circuit and I am having troubles with it. Output of the circuit in the link is fed into bistable flip flop switch.
     
    NyLODA, Sep 14, 2018
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  4. NyLODA

    Alec_t

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    The 555 circuit has a high shoot-through current when its output changes state. If your supply is not adequately decoupled its voltage can dip as a result and cause false operation of whatever it supplies. Try connecting respective 100uF caps across the supply terminals of each 555, as close as possible to the IC supply pins.
     
    Alec_t, Sep 14, 2018
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  5. NyLODA

    NyLODA

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    Ok, thanks i will try.
     
    NyLODA, Sep 14, 2018
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