=== Project goals ===

- Pixel display for patterns and sprites
- Show NES Tetris in huge pixels
- Some pixelflut

Code:
https://github.com/deepestcyber/rgb-tetris-wall

=== Sub projects ===
== Case ==
  * MDF/HDF walls + ground 5mm, acrylic top 3mm, Transparentpapier below acrylic top
  * Modules 40x40cm, 8x8px
  * OR one piece 80*120cm, 16x24px 
  * for modules: 3mm outer wall, 6mm inner wall, 6mm base (to not get too heavy), 3mm acrylic top
  * BUILD THE WALL!

== LED control ==
  * Arduino Mega based (sufficient memory limit, fast IO control)
  * FastLED library
  * SPI in for image-stream, 115200+ baud rate: 24x16px x 50 or 60Hz x 6bit + control bit(s)
  * OR USB/serial for image-stream up to 115200 baud rate: 30Hz
  * Analog inputs for mode switch: Video/Image/Music/Pattern + pattern_program selection
  * Pattern mode: hard-coded RGB rainbow patterns
  * Music mode: sound detection + appropriate patterns
 
=== Image/video preprocessing ===
  * RasPi based
  * NES signal:
    * A/D converter (svideo -> USB)
    * opt for 50/60Hz, 64 colours, perhaps accept 30Hz
    * logic for reading tetris game state (block positions, next block, score)
  * Image presentation:
    * opt for 24bit colours
    * web interface for uploading pictures
  * Trigger Rainbow/Music mode

=== Energy supply + controller case ===
  * Prepare for 4 x 18A/12V power lines (overall around 72A/864W)
    * This allows for 0.02x24x16x9 leds (=69.12A)  
    * Cheaper option: 2 instead of 3 strips per cell: 46.08A -> only 2.88A per column
    * Central power unit, but separate power strip for every column (16x)
    * Organised as 4x2 molex connector
  * Case houses: power unit, raspi, arduino, power switch, 1x mode switch button, 2x pattern/submode switch buttons, 2x speed switch buttons, 2x brightness switch buttons, 1x power switch, 1x child-secure switch (buttons only work, when switch enabled)


=== Link dump ===
  * http://wiki.openmusiclabs.com/wiki/ArduinoFFT
  * https://github.com/FastLED/FastLED/wiki/FastLED-Design
  * https://github.com/FastLED/FastLED/blob/master/examples/Ports/PJRCSpectrumAnalyzer/PJRCSpectrumAnalyzer.ino
  * https://wiki.attraktor.org/Lasercutter#Dokumentation


=== TODO ===

  - Compile pyv4l @ raspi (needs v4l-dev), see ''~/rgb-text-wall/download/pyv4l/''
  - Integrate SPI prototype into rgb-tetris-wall code
  - Fix YCrCb conversion in streaming tool (see ''streaming/encoding.py'')
  - Build remaining case parts
  - Complete the base detection (music mode) und develop nice visual patterns for that
  - Acquire good Potentiometer