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  • help with micro switch

    I have a IBM latop in a mini dock, docking station.
    I though I could just wire up an extension into the on/Off switch on the docking station.
    But when I opened it up the on/off button push against a rod that extend down to the main circuit board where there is a tiny switch.
    anyways, I can solder, no problem, BUT the little switch has 5 leads coming out off it!?!?!

    one side has 3 and the other side has 2.

    anyone know why the switch would need 5 leads??
    and switch 2 do I need to solder to turn it on??

    thanks

  • #2







    The top right pin has the word "SW1" near it, so I'm guessing that's one of them, still need to find the matching pin for that

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    • #3
      more than likely there is still only 2 that need momentary contact with each other
      to start it..... picture?
      MY NEWEST INSTALL:modded infiniti fx with big screen

      first windows carpc install........my liquid cooled LVDS screen :D

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      • #4
        ahh, pictures...

        just test the 4 corner ones.... pick one, then touch it with a jumper to one of the others..... continue until it starts..... those are them....
        MY NEWEST INSTALL:modded infiniti fx with big screen

        first windows carpc install........my liquid cooled LVDS screen :D

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        • #5
          Often times there are redundant leads on surface mount tact switches like the one in the picture. Looks at the traces on the PCB and see where they go. You will see that that there are only two different traces leading away from the switch. They usually have 4 leads. I have never seen one with 5. Maybie there are two common pins, a normally open and a normally closed.

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          • #6
            Try measuring between the different leads with a voltmeter. If you find a voltage, keep the leads connected and push the button, and see if the voltage goes to zero when the button is pressed.

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            • #7
              Originally posted by BassBinDevil
              Try measuring between the different leads with a voltmeter. If you find a voltage, keep the leads connected and push the button, and see if the voltage goes to zero when the button is pressed.

              Shouldn't voltage only go throught when the button is pressed??

              finally found my volt meter
              OK, I've found that when I have connectors on
              the top left and bottom right pins AND the button is pushed I get connectivity.
              (when the button is released, connectivity is broken)

              On the other hand, without holding down the button
              I only get connevtivity on the Top left and Top right pins
              BUT there is NO change if the button is pushed......

              Right now I'm guessing I should use the first scenerio, right?

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              • #8
                dude, it really is as simple as test jumping one by one to see which one fires it
                MY NEWEST INSTALL:modded infiniti fx with big screen

                first windows carpc install........my liquid cooled LVDS screen :D

                Comment


                • #9
                  Originally posted by turbocad6
                  dude, it really is as simple as test jumping one by one to see which one fires it
                  yeah, I just don't wanna fry the board (it's happened before in the past )


                  I'll give that a try tomorrow, time for some sleep

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                  • #10
                    Check out my sig as well. Lots of good info from numerous users. Covers this a few times. Laptop Power On Module

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