Difference between revisions of "LED sleeve"
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=== synopsis === | === synopsis === | ||
LED sleeve, also known as OHM2017 torch is a project [[User:Xopr|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). | LED sleeve, also known as OHM2017 torch is a project [[User:Xopr|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). | ||
Revision as of 22:07, 8 March 2021
| 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 | |
| No project picture! Fill in form Picture or Upload a jpeg here | |
Contents
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)
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:
- 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
todo
- determine which twist works with the software (the other mirrors the display)
