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556 Timer

Discussion in 'Electronic Basics' started by DaveK, Mar 10, 2007.

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  1. DaveK

    DaveK Guest

    I'm very new to this elecrronic stuff, but I was able to do what I
    needed with the 555 timer, but I am lost with trying to get the 556 to
    do what I need.

    I'm using a 556 timer and below is what I would like to happen. If
    anyone can make up a schematic or something to get me going in the
    right direction I would surely appreciate it. Please contact me if
    more information is needed.

    With Mercury switch closed (1st timer)
    Turns on Buzzer for 2 seconds (which I want) unless switch stays
    Gives power to second timer (momentary switch) even if the 2 seconds
    on the 1st timer has elapsed.
    With Momentary switch closed (2cd timer)
    Sends power to a LED
    Continues to stay closed till 1st timer switch is activated again

    Thank You for Your Time,

  2. Puckdropper

    Puckdropper Guest

    Your 556 is two 555s. Look at pin layout diagram, and simply map the
    signals to the other pins. If I remember right, one 555 is on one side
    and the other is on the other. You can't put a 556 in the same socket as
    a 555 and have it work.

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