LED sleeve

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Project: LED sleeve
Featured: No
State Completed
Members Xopr
GitHub No GitHub project defined. Add your project here.
Description ART-net controlled cylindrical-ish display
Picture
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Artistic impression on how the (new) sleeve works.

synopsis

LED sleeve, also known as OHM2013 torch is a project xopr wanted to do a long time, so at one blue Monday in the summer of 2020, he decided to just build one (two actually), a Micro sleeve in May 2024 and a PoE Sleeve++ in September 2024.

I didn't want to take the trouble to order descent PCBs so everything is piggybacked and hotwired.

first version

LEDsleeve.gif I piggybacked an ENC28J60 module to an Arduino pro mini (that's all there is to, actually).

build

The list you need to build one:

  • 1 Ledstrip WS2812 5m30L/m
  • 1 Arduino pro mini (5V)
  • 1 ENC28J60 or ENC28J60 mini with a separate LM1117 regulator
  • 1 power supply 5V8A (laptop PSU form factor)
  • 1 prototype PCB 13x16 or 8x20 holes (wide v.s. narrow/mini)
  • 3x2 screw terminals
  • 1 header 2x6/2x5 (for ENC28J60 regular v.s. mini)
  • 33cm rainwater drainage (HWA or "hemelwaterafvoer") tube 70mm
  • 1 lid 70mm
  • 4 wire crimp terminal 1.5mm (recommended)
  • 1 or 2 wire crimp terminal 0.5mm or 0.75mm (recommended)
  • 0.4m cable 2x0.75mm
  • 1 wooden base ~70mm diameter
  • 2 large zip ties (to fix the LED strip)
  • 3 or 4 wood screws (for the base)
  • 1 network cable
  • 1 power cable
  • 10cm shrink wrap (recommended)
  • 2/12th paired screw terminals (recommended)
  • 1/4th thick broom stick with a large screw (optional)
  • either
    • flag pole holder (optional)
    • or ground screw with 2m tube (optional; xopr used 3 reduced/verjongde 64cm tube coming off a trampoline)

The PCB is just a connector between ENC28J60 and Arduino (AVR)

  • PCB

  • PCB solder side

  • PCB solder side occupied with ENC28J60

  • Diagram for ENC28J60 mini (3.3v)

  • Diagram for 5V ENC28J60

  • Top with lid removed and screw terminal visible

  • Bottom with backfeed for screw terminal visible

  • Completed LED sleeves

notes

The cost per led sleeve is between €35,- and €85,- depending on your sources (local/ebay/scrap).

Some important notes:

  • the correct winding is top to bottom, clockwise (seen from the top, i.e.: from top right to bottom left)
  • I had old Arduino pro minis with old/wrong bootloaders: for these kinds, select Arduino Uno to be able to upload any sketch
  • make sure you don't use other diameter pipes (like 75mm drain pipes) or your image will be garbled
  • to solder the headers on the solder side, you have to offset them from the PCB (I used scrap plastic from zip ties)
  • the power supplies on ebay are very dubious! They are refurbished (sloppy) and given the wire gauge I strongly doubt the were built for 8A continuous use. Don't leave them unattended
  • feed the ledstrip from both sides to prevent discoloration
  • the Arduino libraries can be a pain to find and/or get working. YMMV.
  • for added safety, crimp your stranded wires; it's not worth risking fire for a couple of cents extra
  • regarding the firmware[1], make sure to install these specific library versions (and no higher as these are the last working versions for this project):

sleeve++

This version uses a PoE++ injector and a PoE+ splitter to have less cable clutter and make life easier.

It also switches from a cheap Arduino pro mini, ethernet and perf board "glue" to an Arduino Nano clone; the LGT8F328P-LQFP32 MiniEVB, and an ethernet board that fits this footprint. The LEDstrip is 12V this time and the AVR clone came with its own challenges, but nothing major.

notes

  • The Ethercard library had to be modified to use the Arduino SPI methods (so SPI initialization is done correctly on the LGT8Fx)
  • I fried an ethernet controller by putting 12V on the Arduino Vin pin; the Arduino itself was able to handle it, although it became very hot, so I switched to a buck converter to be on the safe side.
  • All LEDS on will draw approximately 1.688A (at 12V)
  • Originally, I had a PoE++ 7.5A extractor, but it doesn't fit in the 70mm tube; I was thinking on buying an adaptor but I tried small extractors first:
    • LS-POE-1210GK: jumped into protection at 1A
    • LS-POE-1210E, the 24-48V version also jumped into protection at 1A
    • LS-POE-1210DK: success using approximately 1.5A, but seemed to have some glitches

todo

  • share ethercard changes
  • moar pictures

also see

  1. ↑ controller firmware
  2. ↑ https://github.com/njh/EtherCard/releases/tag/1.0.0
  3. ↑ https://github.com/FastLED/FastLED/releases/tag/3.3.2
  4. ↑ https://fastled.io/
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