project

LED Grid Wall — own a pixel in the Adom workcell

Public Made by Adom

by adom

A 12,960-LED addressable wall for the Adom workcell: 9 identical 160x160mm tiles (1,440 Dialight 587-1024-147F 2020 LEDs each, RP2040 + USB-C per tile) on a LrgLrg 576x576 scaffold. Remote Adom users each own a pixel.

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LED Grid Wall — own a pixel in the Adom workcell
Contents

README

markdown

LED Grid Wall — own a pixel in the Adom workcell

A wall of 12,960 individually addressable mini RGB LEDs on a LrgLrg (576×576 mm) workcell scaffold: 9 identical tiles in a 3×3 grid, each tile carrying 1,440 Dialight 587-1024-147F 2020-package LEDs at 4 mm pitch. Every LED can be owned by a remote Adom user who sets its color anytime; a live camera in the workcell watches the wall, so a design emerges as users coordinate with each other.

Architecture

  • Tile (this build's one board design): 160 × 160 mm, 4-layer, 1,440 LEDs in a 40×36 grid. The bottom 16 mm strip carries the brains: an RP2040 (4 parallel PIO-driven WS2812 chains, ~90 fps full-tile refresh), USB-C to the workcell host, W25Q128 flash, 12 MHz crystal, AP2112K-3.3 3.3 V rail, and a 74AHCT125 level shifter for 5 V LED data. Power enters through Adom large machine contacts (5 V, firmware-capped at 20 A per tile).
  • Scaffold: 3×3 tiles on the 576×576 LrgLrg scaffold; the LED fields of adjacent tiles align so the grid reads as one continuous canvas on camera. MCU strips form three thin horizontal bands.
  • Firmware: ledgrid_tile (Pico SDK, PIO + DMA, USB CDC bulk frames, global power cap, dead-host watchdog). Host reference: host/tile_host.py maps (tile, row, col) → (chain, index).
  • Ownership app: remote users claim and color LEDs from the Adom cloud; the workcell host relays frames to tiles over USB. Simulation available while boards are at the fab.

The LED

Dialight 587-1024-147F (Mouser 645-587-1024-147F): a 2.0 × 2.0 mm addressable RGB LED, WS2812-protocol compatible (800 kbps single-wire NRZ, 24-bit GRB), no external capacitor required, 5 mA per channel. Chosen as the densest Mouser-stocked addressable LED — the Worldsemi WS2812B-2020 (Adom basic part) is the same density class but was out of stock everywhere at design time. Component page: adom/587-1024-147f.

Build record

Document Contents
docs/plan/DECISIONS.md Locked design decisions + power budget
docs/plan/COMPONENTS.md Component → wiki page register
docs/plan/GENERATOR-SPEC.md The board generator's engineering spec

Status

In design. Tile PCB authored by generator + AI Flow run (native KiCad placement/routing/pours landed live and recorded). Gerbers target the InstaPCB 300×380 mm panel (2 tiles per panel).