How to make a 555 timer control a relay?

Discussion in 'Homework Help' started by Squerl101, Sep 25, 2012.

  1. Squerl101

    Thread Starter New Member

    Sep 25, 2012
    2
    0
    Hey guys,

    For my project, I have made a turn signal-like flashing circuit. It runs on 12 volts, and has 4 LEDs that fill up like a loading bar when 12 volts is applied. It clears out when no voltage is there. That's what makes it look like a turn signal. So what needs to happen is I need to make another 555 control a relay that turns that circuit on and off, making it look like a turn signal :confused:. If someone could link me to a schematic, that would be great. Thanks!
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Not sure what your after, but you can use pin 2 and 6 from the 555 as an analog signal, it is a ramp.

    Bill's Index

    I have several 555 sources in my blog. I am one of the 555 experts around here. Show us your schematic.
     
  3. Squerl101

    Thread Starter New Member

    Sep 25, 2012
    2
    0
    Thank you, sorry about the lack of info, I want the relay to be able to click on and off like a car flasher.
     
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    Maybe you don't need a relay on your circuit.
    You only add a NE555 Astable Oscilltor in front of your circuit, the NE555 will output a Square wave 0V and 12V(around), it can be drive your circuit.

    You can adjust R2 value to match your need.

    [​IMG]
     
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