Fibonacci32 is a beautiful 50mm circular disc with 34 WS2812B-Mini 3535 RGB LEDs surface mounted in a Fibonacci layout.

I decided to include 34 LEDs since it's a number in the Fibonacci sequence, only 2 away from 32, and there was room on the 50mm PCB. I'm calling it Fibonacci32 so that it fits in with the rest of the series.

Includes only the printed circuit board with LEDs, does not include parts that are required to assemble and run it (microcontroller, power supply, wires, etc). See below for recommended parts.

I have created several LED art pieces in Fibonacci patterns. They are all very labor intensive to create, and so are fairly expensive and limited in quantity. I wanted to come up with a Fibonacci layout that was at least slightly easier to create, and therefore more affordable.

I have RGB LEDs in just about every form they come: strips, strings, rings, discs, etc. The LEDs on most discs are arranged in very regular rings. Fibonacci64 is different. The LEDs are arranged in a Fibonacci distribution. The makes the layout very organic and seemingly messy. But with the proper animation, spiral patterns emerge with spectacular results.

Each of the 34 WS2812B-Mini 3535 RGB LEDs has its own decoupling capacitor built in to reduce noise. The top and bottom of the PCB are large 5V and GND planes, to allow for the large amount of current required by the 34 LEDs. Two separate three-pin headers are provided. One for 5V, Data In, and GND, and the other for 5V, Data Out, and GND. The Data Out pin can be used to connect to even more LEDs.

Specifications

• Size: 1.98 x 1.98 x .063 inch (50.2 x 50.2 mm x 1.6mm)
• 2 layer printed circuit board
• FR4 substrate
• Green SMOBC (solder mask over bare copper)
• HASL (Hot Air Solder Leveling) Finish
• Designed in the US by Evil Genius Labs
• Some PCBs are manufactured in the US by OSH Park in their After Dark (clear soldermask on a black substrate for stylish boards) finish!
• Some are assembled in the US by Evil Genius Labs

Parts

Parts that are not included, but are required to assemble and use:

• Microcontroller (Arduino, ESP8266, ESP32, etc):
• Any of my LED controllers will work.
• Pixelblaze by ElectroMage
• Power supply, or run off of USB power from microcontroller.
• Wires, connectors, crimp tool, etc.
• Soldering iron, solder, etc.

Parts I used in my builds (also not included):

• Wemos D1 Mini ESP8266 Level Shifter Mini Shield Kit is a great option. It's what I've used in all my builds.
• USB power from microcontroller, with FastLED's power management to limit the maximum brightness and keep total current draw under 2A.
• Dupont Connector Pins
• Dupont Connector Housings
• Dupont Crimper Tool
• 24AWG Stranded Wire
• 90 Degree Header Pins

The "Fully Assembled" option requires, but does not include, a USB Micro B cable and power source (USB port, AC power adapter, battery pack, etc).

Assembly Instructions