555 timer delay circuit

Discussion in 'General Electronics Chat' started by ak47_hardik, Nov 9, 2010.

  1. ak47_hardik

    Thread Starter New Member

    Nov 9, 2010
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  2. theanih

    New Member

    Oct 3, 2010
    21
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    i used this delay circuit to open a circuit for and close the circuit again after an amount of time for my earlier project. i don't know if it can help you but it was useful to me.

    Time(sec)=1.1x(R1)x(C1)

    R in ohms
    C in farads

    sorry if i can't help you.
    good luck! :)
     
  3. theanih

    New Member

    Oct 3, 2010
    21
    0
    oh yeah, for the relay, use a normally closed so that when the delay circuit is on, it will open the other circuit and close it again after that.
     
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