{
  "id": 16426734,
  "title": "From 1,464 Unrouted Nets to Zero — But I'm Still Not Calling This Board Manufacturable",
  "url": "https://urgent.news/2026/10/25/from-1-464-unrouted-nets-to-zero-but-im-still-not-calling-this-board",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-25T04:14:44.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/tomoyacreater/from-1464-unrouted-nets-to-zero-but-im-still-not-calling-this-board-manufacturable-2c4h"
  },
  "original_language": "en",
  "account": "On October 25, a Raspberry Pi CM4 Mini-ITX IO board was formally verified as routeable and free of errors, with no unrouted nets or mismatches between the schematic and PCB. However, the board remains unreleased and un-manufacturable due to a fault simulation leaving -1.35 V on a power controller pin, which has not yet been explained. Despite 384 passive SPICE conditions and 12 vendor-model startup simulations passing, the strict all-checks pass flag remains false. The board's silkscreen still labels it as an engineering prototype not to be fabricated.",
  "summary": "TL;DR Part 2 of letting an AI agent (Codex, driving KiCad through its CLI) design my Raspberry Pi CM4 Mini-ITX IO board. The board is now fully routed and adopted as the official design : ERC 0, DRC 0, unrouted nets 0, schematic↔PCB mismatches 0. Vendor-model power simulations that timed out last time now complete all 12 cases. And yet the strict all-checks pass flag is still false , and I am not…",
  "key_points": [
    "Raspberry Pi CM4 Mini-ITX IO board formally verified as routeable on October 25",
    "Fault simulation leaves -1.35 V on power controller pin, not explained",
    "Board labeled as engineering prototype, not to be fabricated"
  ],
  "editors_take": "Achieving perfect routing does not guarantee production readiness when unresolved electrical faults prevent a design from meeting the rigorous safety standards required for formal manufacturing.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}