LED sleeve

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Project: LED sleeve
Featured: No
State Completed
Members Xopr
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Description ART-net controlled cylindrical-ish display
Picture
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LEDsleeve.gif

synopsis

LED sleeve, also known as OHM2017 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).

I didn't want to take the trouble to order descent PCBs so 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)
  • flag pole holder (optional)

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

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 bootloaders that needed some extra work
  • 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

also see