LED cubes were once an exercise in IO mastery, requiring multiplexing finesse in order to drive arrays of many LEDs. Going RGB only increased the challenge. This build from [DIY GUY Chris] shows how much easier it is these days, when every LED has a smart addressable controller on board, and serves as a great sci-fi prop to boot.
Yes, the build relies on the venerable WS2812B addressable LEDs, soldered up in 5×5 grids on each of the six faces of the cube. Running the show is the Raspberry Pi RP2040 microcontroller, sourced here as an individual part rather than in its development board form. An SPI memory chip is on board for the code, along with a USB-C connector for programming. Signals pass around the cube via soldered connections along the edges of the custom PCBs that make up the faces of the solid.
Sitting on its 3D printed stand, the cube glows brightly while drawing a full 2 amps of power. [Chris] coded up a variety of animations, from simple color breathing routines to frantic dazzle animations sure to captivate any cyberpunk thieves that come to steal your magic glowing artifact.
If rectangular prisms aren’t your fancy, though, you can always consider building yourself a glowing D20 instead. Video after the break.
3 thoughts on “2022 Sci-Fi Contest: Glowing LED Cubes Make Captivating Artifacts”
“any cyberpunk thieves that come to steal your magic glowing artifact.”
That is *totally* a Quantum AI core that a party of Runners are planning to steal from Renraku in an epic heist.
“while drawing a full 2 amps of power”
In the video it mentions drawing 1.3A at full brightness, so you’ll need at least a 2A power supply.
I need to finally somehow document my build: 8x8x6 neopixel cube, with 9 axis IMU, lithium batteries and Pi Pico brain (-:
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