230v relay switching problem with rf

Discussion in 'General Electronics Chat' started by vijaybe, Dec 18, 2014.

  1. vijaybe

    Thread Starter New Member

    May 27, 2014
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    230v relay switching problem with rf
    Hi,

    I'm facing relay switching problem by using RF.I'm using the relay in RF Receiver side.I tried with RC snubber circuit in relay coil and relay contacts.But i can't find any solution for that.Relay switching time differs for snubber circuit(tried with different R and C combinations).

    I couldn't switch the relay for right timing through RF receiver. Pls give solutions for this......

    [​IMG]

    - - - Updated - - -

    hi,

    Here i'm using industrial gong bell as a load.


    RF input is given to transistor base.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    What feeds R1? (voltage?, current available?)
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,800
    1,104
    There's your problem. You need DC on the base.
    We don't know what voltage you intend to apply to R1, but R1=10k is probably much too high. Assuming your relay coil needs 100mA to operate, you need ~10mA base current.
     
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