555 timer

Discussion in 'General Electronics Chat' started by Leecavturbo, Feb 2, 2013.

  1. Leecavturbo

    Thread Starter New Member

    Feb 2, 2013
    13
    0
    Hi chaps, first post.
    Can 555 in astable give 1 sec high then 6 sec low?
    THX
     
    Last edited: Feb 2, 2013
  2. Leecavturbo

    Thread Starter New Member

    Feb 2, 2013
    13
    0
    To be specific circuit arrangement and values of resistors and caps for 1 sec high and 6 Secs low would be awesome id hopefully be able to power a low power relay directly too?
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    What is the problem, is it the math? You assume a capacitance, say 10µF, then calculate the resistors.

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    Combine the two circuits, one with the driver, the other with the oscillator. You didn't mention power supply voltage, so I assumed 12VDC, if it is lower you will need a different driver.
     
    PackratKing and Leecavturbo like this.
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