WS2812b Modular Board
thingiverse
Will hold 9 Modules per board. End bits added. Grid segments added. Compatible with https://www.amazon.co.uk/dp/B01DC0J3UM/ref=cm_sw_em_r_mt_dp_U_.f4VCbG8XTTTH https://www.banggood.com/100PCS-Mini-Board-Heatsink-Built-in-RGB-WS2812B-Chip-Bead-LED-Pixel-Addressable-Module-DC5V-p-1194862.html Pieces tap together nicely. Prints with no supports. Squares Side down. I used 1/0.6 Equipment Wire with the plastic stripped off. Using Arduino to power it with FASTLED https://youtu.be/4A1bH25LVBY
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