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Thread: Ultimate control over interior lighting

  1. #31
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by Vipergts/r
    What do you think of this: http://www.emanator.demon.co.uk/bigclive/rgb.htm
    Just make an USB or IC control for it and you can use it.

    @shotgunefx: Looks damned nice. Dou you have a schema of that? And how do you control it?
    Thanks. Basically, there is a PIC master controller that has 3 seperate RGB channels driven by PWM (Trying to get a few more channels. It does some other car stuff as well, but that's for another time). The input controls are 3 rotary encoders (Input will come from other sources, but that too is for later). I'm still tweaking the software though. These channels drive "light boxes". Nothing too special, a custom PCB with basically an interface, regulator, transistors and a ton of resistors and molex connectors.

    Each light box can handle 18 RGB leds. The way it's setup, I could with a handful of resistors, have a box drive another box.

    So far the channels are Inside, Outside Left, Outside Right. In version 2, I had the exteriors wired to the blinkers to change color when signaling. I used a big complicated relay arrangment for this and it worked fine, until an unintentional short killed everything. Which is why I'm on V3

    As far as any detailed stuff, I've invested a lot fiscally and in labor getting it to the point it is. I'm pondering making it a kit at some point to recoup a little bit and more importantly, start shifting to car products/services for a living, so you'll forgive me if I don't post schematics and source.

    If I decide against it, (I very well might), when everything is done, then I'll post detailed info.

  2. #32
    Raw Wave lostreception's Avatar
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    looks great i think id be very interested in a kit if you were to rls one.
    eventually my plan is to make my van a mobile club with lighting control programs set to different music etc. kick on some house music fog machine and some phidgets and oh boy

    great work keep us posted
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  3. #33
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    If anybody is still watching this thread, here is a chip that will work good. http://focus.ti.com/docs/prod/folder...t/tlc5940.html The only reasons I have not started working on my LED controller (over 1k leds) is that I am working on annother project (Long Range Key Fob with USB Receiver : Hardware/Software Design Thread, don't know what controller to use for this chip, and don't know anything about serial datashift. If anybody can tell me how to use datashift through usb or serial ports (with a controller) let me know and when I finish my FOB, I might start this project.

  4. #34
    Variable Bitrate fromplanetbob's Avatar
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    Here is an easy way to resolve this, hook all the Blue, Red and Yellow lines together. Hook them to the output of 3 - 8 bit DAC's (Digital To Analog Converter). Now put a transister on the common (anode or cathod) and use a bunch of address decoders like the 74154 (http://focus.ti.com/docs/prod/folder...t/sn74154.html) - you'll need one for each 16 LEDs.

    Now, first you disable the outputs of the 74154. Then set the intensity of each of Yellow, Blue, Red by adjusting the 3 DAC outputs. Now set the LED address in the 74154 decoder array. After the DAC outputs settle (time determined by the type/brand of DAC you use) then enable the output of the 74154.

    Continue this for each LED. You would be good to put like 16 LED's into a single module which operates independently.

    However, the final solution is going to be expensive. The good news is you can set this up with regular LED's at 10 cents a pop and try it out first.

  5. #35
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    It would be really cool if someone wrotea a program to read audio from the soundcard and do visulaizations.

  6. #36
    MySQL Error jcdillin's Avatar
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    that would actually be pretty easy, once the first part of the hardware was completed
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  7. #37
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by jcdillin
    that would actually be pretty easy, once the first part of the hardware was completed
    You could use DiscoLitez. It's a winamp plugin using the parallel port to drive lights. I haven't used it yet as I'm on linux. One of these days I'll start screwing with XMMS plugins to get a similar effect.

  8. #38
    MySQL Error jcdillin's Avatar
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    update, National just released a chip that will control LED's based on a audio input

    http://www.national.com/pf/LM/LM4970.html
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  9. #39
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by jcdillin
    update, National just released a chip that will control LED's based on a audio input

    http://www.national.com/pf/LM/LM4970.html
    Damn. Nice find. You can also control them directly it looks like. I'll have to pick a few up.

  10. #40
    Raw Wave shotgunefx's Avatar
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    Just ordered a half dozen from digikey. If they work as expected, I'm going to ditch my current controller and make a new one based on this.

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