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  • CPU speed LEDs

    This doesn't really apply to my MP3 player (rather, the case I just got for my file server), but here goes...

    Anybody remember when cases came with those little 2-character LEDs that displayed the CPU speed? I have one on a case I just got and I'd like to get it working. There're two rows of 12 jumpers each on the back of the LED module, and I'm just wondering if this is standard, and if anyone can tell me how to configure the thing (right now it isn't displaying anything), or give me a link to a site explaining it. Sorry, this is totally off-topic, but I'm at a loss for where to find this kind of info.

  • #2
    it needs power, probably 5v & ground. but it might use 12.... try five first

    look for vss vdd or vcc on the board or "+5v" then just play with jumpers.
    moving the jumpers around makes the display light up.
    Gizmo-
    Techonlogy on Wheels
    http://www.hjnetworks.com/car

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    • #3
      There are several standards. As mentioned, it powers up with 5V. Even with the little piece of paper that tells you what's what, I always found it much easier to simply move things around until I got it right. It will take about 30 seconds to discover the pattern...

      ------------------
      Aaron Cake
      London, Ontario, Canada

      Player: Cyrix 200, 32MB RAM, 10.2Gig Quantum HD, Onboard EtherNet/Sound/Video, Custom Lexan Case, Arise DC-DC, Win95 Kernal w/Custom Player
      Car: '86 Mazda RX-7 w/Basic Performance Upgrades
      Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
      Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
      "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

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      • #4
        I have one too. it works 3 volts. with 5 v it gets really hot. there are two trhee lie jumper:

        . . . . . . .
        . . . . . . .
        . . . . . . .

        . . . . . . .
        . . . . . . .
        . . . . . . .


        and jumpers on sideways:

        . . . -- --..--
        . . . -- . . .--
        -- -- -- .. .. ..


        .. .. .. -- -- --
        -- -- .. .. .. ..
        .. .. .. .. .. ..

        like that.
        there can't be two or three jumpers in the same spot like this:

        -- ..
        -- ..
        -- ..


        .. empty place

        -- jumper

        messy, but hope it helps
        WINAMPCAR
        Project almost ready

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        • #5
          Ah, thank you. I have the power connected, but nothing comes up. Hopefully that just means there're a few too many jumpers on or off, and not that the thing is bad (not that I care that much, but it'd be kinda cool to have).

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          • #6
            By the way, you can make those things say anything you want. Since the initials of our shop are "ACI", we flip the displays upside down and spell out "ACI". People think it's cool...

            ------------------
            Aaron Cake
            London, Ontario, Canada

            Player: Cyrix 200, 32MB RAM, 10.2Gig Quantum HD, Onboard EtherNet/Sound/Video, Custom Lexan Case, Arise DC-DC, Win95 Kernal w/Custom Player
            Car: '86 Mazda RX-7 w/Basic Performance Upgrades
            Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
            Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
            "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

            Comment


            • #7
              Well, I sort of figured out how it works. Kinda like I expected--each jumper corresponds to a bar on the second LED array. Only thing is, the first LED is controlled by just a couple jumpers, which basically allows it to display only the numbers 1, 2, and 3. And the whole lower row of jumpers doesn't seem to do anything, so I'm assuming there's some sort of bypass for the first number that allows you to configure it on the lower jumpers. Blah. The whole thing is totally cheesy, but the case rocks and it looks dumber with the LEDs off than it does with them displaying 10, which is what it is currently set at...

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              • #8
                is that for 1.0 ghz?

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                • #9
                  Hah. No. I wish. Try 100 mhz. It's my poor old 486dx100 that I'm turning into a Linux file/web/whatever server.

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                  • #10
                    In my system, the third pin row was because the turbo-button. Can you see it now?

                    [This message has been edited by embedded (edited 03-12-2001).]
                    WINAMPCAR
                    Project almost ready

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