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  • Need electronics pro advice on this one...

    Hello,

    I am looking to extend the HD and Power LED from this PCB. It is another wonderfull Dell proprietary specialties.

    What I am looking to do is detach the LEDs from the PCB and then attach them back again with thin guage wire.

    I have attached 3 pictures to this thread. One is the front of the PCB, the back of the PCB and then the two overlayed on one another.

    I thought of attempting to splice the into the ribbon but then I began to wonder wich wire was wich. I tried to trace the leads on the PCB but then I went cross-eyed LOL.

    I am no electronics pro but I do kow how to weild a soldering iron and use way too much wire tape. Any help would be appreciated!

    Thank You

    Leo
    Attached Files

  • #2
    You can always just use a soldering iron to loosen the solder right under the light, pull the light out and solder two wires in its place, without hacking up the ribbon.

    If you don't want to do that and can't trace the wires with your eyes, you can use a continuity checker to see which wire is which by trial and error. Using your eyes, you should be able to narrow it down quickly.

    Also, look at the motherboard where the ribbon normally connects. See if there are labels on it there. Most have labels indicating which pin is which.
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    • #3
      Just for the record, pin 1 is the red one. Pin 1 is also marked on that PCB. Im in a rush so I wont type a novel, but there's your starting point. Should be REALLY self-explanatory after that.
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      • #4
        +1 for the continuity check using a multimeter. Cheap insurance. It's saved me from frying stuff numerous times.
        Originally posted by ghettocruzer
        I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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        • #5
          if i am not mistaken wires on the ribbon cable... 1 and 3 hdd led, 2 and 4 power led

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          • #6
            Could someone elaborate as to how the pins under the connector associate to the wire on the ribbon. Does each wire on the ribbon have it's own pin on the connector or is it fastened in a diffrent manner ?

            This is the very reason I do not like proprietary setups when it comes to PCs. If I recall from my days when I built PCs as a hobby their used to be individual pins on the mobo that were labled simply like "PWR" and "HDD LED".

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            • #7
              Originally posted by DEV8ED View Post
              if i am not mistaken wires on the ribbon cable... 1 and 3 hdd led, 2 and 4 power led
              That would be correct

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              • #8
                the wire with the pink trace is wire 1.. than 2 and so on... attached a pic of them labled on the board
                Attached Files

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                • #9
                  First of all, thanks to everyone for the help!

                  DEV8ED if I am understanding you right, using the picture above, the sequence of the wires on this ribbon is 16 to 1 (striped red). So standards do hold true and the red stripe means wire #1 on all ribbon cables and not just for hard drives etc. As for the pins the are mapped out in a right to left/down up fashion.

                  Thank You

                  Leo

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                  • #10
                    The overlayed picture I created above was a spur of the moment idea. I was just wondering if it helped any ?

                    Thank You

                    Leo

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                    • #11
                      Originally posted by lbergamo View Post
                      First of all, thanks to everyone for the help!

                      DEV8ED if I am understanding you right, using the picture above, the sequence of the wires on this ribbon is 16 to 1 (striped red). So standards do hold true and the red stripe means wire #1 on all ribbon cables and not just for hard drives etc. As for the pins the are mapped out in a right to left/down up fashion.

                      Thank You

                      Leo
                      yeh generly the trace means pin 1... just depends on who made the cable lol...

                      yep in the pic the wires go 16-1 cause ur looking at it from upside down

                      wires
                      1&3 hdd led
                      2&4 power LED
                      5&7 Reset switch
                      6&8 power switch

                      the rest are all unused

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                      • #12
                        Well I have successfully applied what I have learned from this thread and extended the PC's hard drive activity and power LED from the back of the vehicle where the PC is located to the front console where the controls and LCD is mounted.

                        I did not want to mess with the PCB so I spliced ( neatly mind you ) into the ribbon. It was a learning experience. I also soldered and insulated all the inline connections I made.

                        Again thanks to all! Did not want to do this blind.


                        Note: See this thread to get a better understanding of my project:
                        http://www.mp3car.com/vbulletin/show...-vanputer.html

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