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Thread: Auto Dimmer

  1. #11
    Constant Bitrate
    Join Date
    Dec 2008
    Posts
    167
    Quote Originally Posted by sxtnitehawk View Post
    Here's a 17 step autodimmer using the FB photosensor with RRFusion. if you have a definite port for the photosensor, you can change $IN1PORT$ to whatever port number the photosensor is on... so it reads for example... ANALOG0RAW

    sxtnitehawk, thanks for your code. I will try this solution.

  2. #12
    Constant Bitrate
    Join Date
    Dec 2008
    Posts
    167
    Hope touchscreen manufactory can produce a product which allow software to control the backlight. I think the techique should be ready for this. For example, I used the thinkpad. I can use hotkey "Fn+Home or End" to adjust the brightness.

  3. #13
    Constant Bitrate
    Join Date
    Dec 2008
    Posts
    167
    I found a perfect solution. My car has a light sensor in the mirror, so I can set the dimmer based on the sensor value.

  4. #14
    Variable Bitrate
    Join Date
    Sep 2007
    Location
    Export, PA
    Posts
    265
    as long as that sensor puts out a 0-5v signal you can, yeah
    Planning: [|||||||||-] 90%
    Purchased: [|||||||||/] 99%
    Installation: [|||||||||-] 90% (when is anyone's project ever REALLY done...)

  5. #15
    kuo
    kuo is offline
    Variable Bitrate kuo's Avatar
    Join Date
    Jun 2003
    Location
    Greensboro, NC
    Posts
    439
    i have my xenarc's brightness control wire hooked to my car's dimmer knob to automatically dim my backlight when the headlights come on. the wiring diagram is somewhere on this forum. the only issue with this approach is my car's dimmer knob goes from 0 volts at maximum brightness to 12 volts at the minimum brightness while the xenarc goes from 0 volts at max to 3.5 volts at min. when turn the knob too low, the xenarc backlight shuts off and i have to power cycle it to get the backlight back on. i'm sure there's a way to drop the output voltage of the dimmer knob but with resistors or something of the sort but i'm not quite sure how to do it.
    my car: 2003 g35 coupe, 2.5ghz c2d cpu, gigabyte micro atx mb, dsatx
    wife's car: 2004 honda accord coupe 2.4ghz p4 cpu, asus micro atx mb, opus 150
    company car: 2006 chevy avalanche 2.0ghz p4 laptop, cnx p1900

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