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Glass desk LED lighting

Attaching an array of WS2812B LEDs on the edge of my glass desk.
Using strips of stripboard PCB to create custom WS2812B LED strips.

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Attaching an array of WS2812B LEDs on the edge of my glass desk.
Using strips of stripboard PCB to create custom WS2812B LED strips.

The custom strip of 180 WS2812B LEDs is finished and temporarily attached to my desk with tape. In the future I want to build some kind of mount for it that also covers the top of the LEDs so they are more invisible and seamless.

3D printed construction mold

To make the process of creating the LED strips easier I created a mold to ensure even spacing between the LEDs and make soldering them much easier.

  • 180 × WS2812B
  • 1 × Teensy 3.1

  • Power problems & flickering

    Stijn09/02/2016 at 14:44 0 comments

    Power problems

    The first problem is that the LEDs on the right end of the strip don't get enough power because of the resistance in the strip. This causes color difference. This is easily fixed by powering it from the right also.

    Flickering

    Second problem is flickering at lower brightness levels. The first thing I could think of was adding a couple of capacitors. But the issue seems to be the 3.3V output signal coming from the Teensy 3.1. To fix this I need a level converter chip. I still had a 74HCT245 from another project laying around which works just fine :-D

    Although this solution works just great. I eventually connected the strip to the Teensy 2.0 that I am using as my room automation hub, which has 5V output pins. I needed the Teensy 3.1 for another project and it is way more convenient to connect the LED strip to this Teensy instead of a separate one. Frees up another USB port on my computer, and I can now control it from my phone and tablet.

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