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projects:lichtwand [2019/05/31 13:40] – reyprojects:lichtwand [2019/06/02 13:32] (current) – removed rey
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-<markdown> 
-# RGB-Tetris-wall: 
  
-LED-based pixel wall for animations and tetris visualisation. Provides 16x24 RGB pixels on 80x120cm. LEDS are controlled with an Arduino, a Raspi provides input from arbitrary image or stream inputs including showing live Tetris games from NES input. 
-* Github repo: https://github.com/deepestcyber/rgb-tetris-wall 
- 
-|![](https://raw.githubusercontent.com/deepestcyber/rgb-tetris-wall/master/photos/result.png)| 
-|---| 
-|Complete RGB-Tetris-LED-Wall| 
- 
-## Hardware: 
- 
-- WS2811 5050 LED strips (60leds/m, 20ics/m) 
-- 12V power supply (HP 750W HSTNS-PL18), provides 62.5A/12V 
-- Arduino Mega 
-- Raspberry PI 3 B 
-- EasyCAP USB grabber with Syntek STK1160 chip set 
-- Microphone: line in, perhaps with amplifier Iduino SE019 
-- Switches, Buttons, Photo-resistor, 
-- Case made from HDF, with cells of size 5x5x5cm, top layer is Transparenzpapier + 3mm clear acrylic 
- 
-|![](https://raw.githubusercontent.com/deepestcyber/rgb-tetris-wall/master/photos/cables.png)|![](https://raw.githubusercontent.com/deepestcyber/rgb-tetris-wall/master/photos/casebuilding.png)| 
-|---|---| 
-|![](https://raw.githubusercontent.com/deepestcyber/rgb-tetris-wall/master/photos/installed.png)|![](https://raw.githubusercontent.com/deepestcyber/rgb-tetris-wall/master/photos/diffused.png)| 
- 
-Energy supply: 
-- worst case need: 0.02x24x16x9 = 69.12A 
-- mostly organises via 4×2 molex connectors 
-- 12 -> 5V converter for Arduino + Raspi + Controlleds (WS2812b) 
- 
-## Software: 
- 
-### Arduino: 
- 
-Purpose: direkt control of all LEDs via the FastLed library. 
-- controlled via buttons: mode (animations, images, beat dedection, NES Tetris stream, pixelflut), submode (e.g. which animation), speed, brightness 
-- adaptive brightness via a photo-resistor (with voltage divider via 5k1ohm resistor for input pulldown) 
-- annimations: library of 16+ animation patterns: rainbow, fire, plasma, ...  
- 
-Communication with Raspi: 
-- SPI, 487500 bps 
-- Arduino sets sync_pin if ready for receiving data. 
- 
-Libraries (C): 
-- https://playground.arduino.cc/Code/ElapsedMillis 
-- https://github.com/FastLED/FastLED 
-- SPI 
- 
-### Raspberry PI: 
- 
-Purpose: Proprocessing streams of input images, beat detection, NES tetris streams, and pixelflut. 
-- Image processing: cycles through all images that are located in /images 
-- Beat detection: Microphone measures sound for simple beat detection that can get visualised 
-- NES Tetris stream: reads the composite signal of an NES via the Syntek STK1160 grabber. All frames are analysed for the content of the Tetris game: game state, next block, score, level, number of lines 
-- Pixelflut (tm) 
- 
-NES Tetris stream: 
-- NTSC or PAL possible 
-- 12-15 fps feasible 
- 
-Libraries (python): 
-- base64 
-- numpy 
-- Pillow 
-- pigpio 
-- pyserial 
-- PyV4L2Camera 
-</markdown> 
Last modified: 2019/05/31 13:40