TroiaDoc - PixelRoom - PixelBox

• A pixel box contains 8x8 complete pixels and thus has got a size of 1.12m x 1.12m.
• In addition to the pixels, a pixel box contains the drive electronics for the 64 pixels. These electronics consist out of 2 Pixel modules, which are placed on a single circuit board with size 80x100mm, and of the internal cabeling.
• There are only 2 connectors at a pixel box.
• One connector is a fitting XLR plug for the power supply of 5V with 1.5A (100mA for a pixel module is sufficient, LEDs need max 1.3A).
• The other connector is a RJ45-Jack with the following pinout:
  • 4 (blue): A - positive input
  • 5 (blue white): A - negative input
  • 7 (brown white): B - negative input
  • 8 (bown): B - positive input
• This jack is contained on the circuit board with the 2 pixel modules.
• Every pixel box has got a mark on its back indication the position of the top left pixel.
• Only with this mark, it can be avoided that some pixel boxes are rotated after the assembly into the room.
• The addressing of the LEDs is realized according to the following principle: The pixels are counted line-wise from left to the right and from top to bottom. First are the pixels of the pixel module A, then all pixels of the pixel module B.

  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I A 00 I A 01 I A 02 I A 03 I A 04 I A 05 I A 06 I A 07 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I A 08 I A 09 I A 10 I A 11 I A 12 I A 13 I A 14 I A 15 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I A 16 I A 17 I A 18 I A 19 I A 20 I A 21 I A 22 I A 23 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I A 24 I A 25 I A 26 I A 27 I A 28 I A 29 I A 30 I A 31 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I B 00 I B 01 I B 02 I B 03 I B 04 I B 05 I B 06 I B 07 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I B 08 I B 09 I B 10 I B 11 I B 12 I B 13 I B 14 I B 15 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I B 16 I B 17 I B 18 I B 19 I B 20 I B 21 I B 22 I B 23 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
  I      I      I      I      I      I      I      I      I
  I B 24 I B 25 I B 26 I B 27 I B 28 I B 29 I B 30 I B 31 I
  I      I      I      I      I      I      I      I      I
  +------+------+------+------+------+------+------+------+
          
      

Ventilation

• The box is in need of holes for ventialtion.
• If the box is completely closed, all power will be translated into heat inside it: 1.5A * 5V = 7.5W After onw hour of this heating, the box will reach a temperature of 70 degrees Celsius or more...
• The holes for ventilation must be placed in way that in every roation the box is mounted there are holes at the top and holes at the bottom. This is needed to allow the warm air to get out of the box at the top and for the cold air to come in at the bottom. Proposal: holes in the middle of the bottom and at the sides near the front