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Thread: Auto-dim Lilly

  1. #1
    Maximum Bitrate EBFoxbat's Avatar
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    Auto-dim Lilly

    I just read the thread on regulating a low 12v to make it 12.6 to get a nice bright lilly. Seams simple to throw some more risistance in the circuit and make it dim... perhaps a rheostat or something.

    My truck, like many new cars, has auto-sensing headlights. That is, they come on when its dark. the sensor (for my 2004 GMC Canyon) is inside near my instrument cluster (or so I've read.) When the headlights are on, the internal lights dim. How hard can it be to tap this, perhaps with a relay or something? You could add a simple switch to bypass it in the even you want a bright LCD with lights on.

    Thoughts?
    ,./(0)3

    '04 Canyon 4x4 pickup

    [---PC on hold----working on external fiberglass "tool" box---]

  2. #2
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    I am also interested in something like this...

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    Maximum Bitrate GruvThang's Avatar
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    Want to build your own?

    If you are intersted in possibly building one:

    Can anyone design me a lilliput regullator?

    shchua's post on, and the others around, "05-24-2004, 11:58 PM" should help!

  4. #4
    Maximum Bitrate EBFoxbat's Avatar
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    Quote Originally Posted by GruvThang
    If you are intersted in possibly building one:

    Can anyone design me a lilliput regullator?

    shchua's post on, and the others around, "05-24-2004, 11:58 PM" should help!
    Thats the thread that got me thinkin...
    ,./(0)3

    '04 Canyon 4x4 pickup

    [---PC on hold----working on external fiberglass "tool" box---]

  5. #5
    What can I say? I like serial. Curiosity's Avatar
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    There were other threads about putting a 100 ohm potentiometer in series with the 1 ohm resistor that powers the CCF inverter as well, and how that would shorten the life of the CCFL. I don't know if that's because of the lowered Hz on the output? It seems to work well though, except if you turn it on in the day time and forget it's dimmed. I thought I broke it!

  6. #6
    Maximum Bitrate binary.h4x's Avatar
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    LDR is the acronym of the day... Light Dependent Resistor
    2007 Honda Fit Sport 1.5L SOHC-VTEC

  7. #7
    What can I say? I like serial. Curiosity's Avatar
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    I have some photocells. Is that the same thing? Only problem is they range from like 500K to 1M so I couldn't figure out how to convert that to 0 - 100 ohms, or even 0 - 50 would work. I'm a software guy so this is too much for me.

  8. #8
    Maximum Bitrate binary.h4x's Avatar
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    hmm, you could maybe put another fixed resistor in series with it.
    2007 Honda Fit Sport 1.5L SOHC-VTEC

  9. #9
    Maximum Bitrate EBFoxbat's Avatar
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    There must be a way to wire it into the car's auto-headlight system...
    ,./(0)3

    '04 Canyon 4x4 pickup

    [---PC on hold----working on external fiberglass "tool" box---]

  10. #10
    Rub One Out Motoko's Avatar
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    of course u put a relay inline with the switch line that turns the lights on. no?
    CarPC status: iPod, 3,456,217 songs so **** you

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