Light tubes


    Mar 25 2006 | 6:34 pm
    Hi - might not be the right place to ask, but I need to control app. 100
    fluoroscent light tubes individually. I believe one way could be with a
    0-5V dimmer for each and teleo boards, but I wondered if anybody here
    has had experience with this?
    Thanks,
    Lars

    • Mar 25 2006 | 9:03 pm
      yes, i do.
      get two of these:
      http://www.falco.be/store/popup_image.php?pID=1080
      they are not expensive, say � 150,- each.
      they each will give you 72 analog outputs, you can switch them to go
      between zero and 5, 10 or 15volt.
      output is 8 bit resolution/256 steps.
      you can control via midi (slow) or via dmx (fast).
      I've used a lan-box to go from ethernet to dmx.
      My maximum analog-out-experience was to use six of these demultiplexers
      to control a led-installation.
      432 analog channels out, running at 20 fps, worked like a charm and
      very reliable.
      good luck,
      Joost.
      -------------------------------------------
      Joost Rekveld
      -------------------------------------------
      "The mystery of the world is the visible, not the invisible"
      (Oscar Wilde)
      -------------------------------------------
    • Mar 25 2006 | 9:13 pm
      oh, forgot,
      yes, you do need dimmers for each (and special dimmeable fluorescent
      tubes).
      the dimmers are not cheap (if you need a hundred, that is..)
      good luck,
      Joost.
      -------------------------------------------
      Joost Rekveld
      -------------------------------------------
      "The mystery of the world is the visible, not the invisible"
      (Oscar Wilde)
      -------------------------------------------
    • Mar 25 2006 | 10:54 pm
      Great, Joost!
      True, the dimmers is my worry right now as it's my impression they're
      expensive.
      Also, I haven't found any taking a 0-5V control signal (or 0-10, 0-15V).
      Maybe better to DIY, since I'll be needing so many?
      Which dimmers did you use?
      Unfortunately, the tubes have fixed colour. I remember seeing this tower
      in Hong Kong that had the facade covered with circular tubes of changing
      colours. I'm pretty sure it wasn't done w. combinations of different
      tubes - do you have an idea of what these tubes are made with?
      *L