Maker James Brown has provided a invoice of supplies (BOM) for his newest rapidly-spinning volumetric 3D show, powered by a Raspberry Pi 4 and a pair of RGB LED panels, for these seeking to comply with his footsteps on this planet of 3D persistence of imaginative and prescient (POV).
“Somebody constructing their very own voxel show acquired in contact asking for the BOM and I believed that could be of curiosity typically,” Brown writes of the elements checklist. “It is a assortment of issues I had or may simply get in New Zealand, somewhat than essentially the most effective half for the job. If I made one other, I’d change a few of it (lazy Susan bearing, finer pitch LED modules, shorter motor) however this configuration has no less than been proven to work.”
Brown has been experimenting with spinning 2D shows to create a 3D impact for a while, most just lately constructing a higher-resolution volumetric show able to rendering recognizable characters from Id Software program’s Doom. It is this for which Brown has listed the elements, together with its globular housing: a 400mm acrylic globe initially designed for backyard lights.
Elsewhere within the construct, a pair of 128×64 RGB LED matrices are related to a Raspberry Pi 4 Mannequin B single-board pc. “Simply wants one thing with Wi-Fi,” Brown notes, “and sufficient RAM for the voxel buffer.”
There is a customized interface to the LED matrices, a photointerrupter on one of many Raspberry Pi’s general-purpose enter/output (GPIO) pins for synchronisation, a slip ring constructed from alternator components, a “no model pace controller,” timing belt, 115mm bearing, a counterweight of window lead, and a 100W 12V PSU.
“[The motor controller] will likely be changed by a motor driver,” Brown writes of a future revision of the show, “related to a microcontroller speaking with the spinning [Raspberry] Pi through Bluetooth.”
Brown’s full BOM is obtainable on this Mastodon thread.