Grok Bot

@@ -69,3 +69,18 @@ adom-aiflow's from-scratch run passed its current check but stopped before the t | power delivery | /VIN 0.62x and /VOUT 0.30x of target; hot-plug spike 14.5 V against C2's 25 V |  Nine issues: one medium (its 4 GND vias sit just outside the 3 mm the screen checks around U1's tab) and eight low (edge stitching gaps, a ground loop through J1 and J2, no TVS on the input or output). Grok marked its assumptions: U1's loss and the 5 ns switch-node edge are its estimates, the airflow values are the tool's, and the EMC screen counts only the switching loop. 63 s. [Download](clips/05-fields.mp4) · [captions](clips/05-fields.vtt)++### 6. Grok's first molecule++::adom-video{src="/adom/grok-bridge/render/first-ai-pcb/clips/06-molecule.video.json"}++Adom boards follow the Adom molecule standard, which the first brief left out, so Grok reworked its own design to it from the standard alone (the aiflow-molecule skill and the Adom KiCad Library footprints), still without looking at our earlier buck. MP1 to MP4 machine pins sit in the corners on GND; MachineContactMedium contacts replace the screw terminals, J1 VIN, J2 GND and J3 EN on the left edge and J4 VOUT and J5 GND on the right; every pin and contact is on the 2 mm grid from MP1; the outline is 36 x 20 mm (a 32 x 16 mm pin span) with 2 mm radius corners. EN was Grok's own addition, so the Control Panel can shut the converter off, and Grok gave it a 100 nF capacitor at U1 once Fields flagged it.++| | first board | molecule, first pass | molecule, final |+|---|---|---|---|+| /VOUT peak current density | 21.5 A/mm² | 85.2 A/mm² at J4 | 9.2 A/mm² |+| U1 rise, still / moving air | +12.1 / +7.6 °C | +23.6 / +15.0 °C | +23.5 / +15.0 °C |+| EMC margin (FCC Part 15 B) | 48.1 dB | 48.1 dB | 48.1 dB |+| issues | 9 (1 medium) | 6 (2 medium) | 4 (all low) |++The J4 number was real copper, not a display quirk: the solve log showed /VOUT reaching J4 only through its 0.26 mm back-side ring, with no path to the rest of the net. Grok widened the /VOUT copper at J4 and added vias, and /VOUT then solved as one piece over 89.5 mm². U1 runs warmer because the board has half the copper; it stays inside Grok's 40 °C budget. ERC 0, DRC 0 violations and 0 unconnected, the molecule check passes, all silkscreen is at least 1.0 mm, and every contact is labelled on both faces. Grok still lists two necks worth widening (/GND 18.1 A/mm² beside U1, /VIN 17.0 A/mm² from C4) and four low issues (a ground loop through J2 and J5, no TVS on VIN, EN or VOUT). Played on the office GPU at 60 fps. 53 s. [Download](clips/06-molecule.mp4) · [captions](clips/06-molecule.vtt)

@@ -0,0 +1,22 @@+[+ {+  "t": 0,+  "title": "The molecule standard"+ },+ {+  "t": 14.6,+  "title": "The J4 neck"+ },+ {+  "t": 30.8,+  "title": "Current and heat"+ },+ {+  "t": 39.0,+  "title": "EMC and power"+ },+ {+  "t": 46.3,+  "title": "Grok's first molecule"+ }+]\ No newline at end of file

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@@ -0,0 +1,52 @@+1+00:00:00,000 --> 00:00:03,400+One correction: Adom boards follow the+molecule standard.++2+00:00:03,610 --> 00:00:12,200+So Grok reworked its board on its own+computer: machine pins in all four+corners, machine contacts on the edges+instead of screw terminals, everything on+a 2 mm grid, and a 36 by 20 mm outline+with rounded corners.++3+00:00:12,440 --> 00:00:14,400+Grok added an enable contact so the+control panel can switch it off.++4+00:00:14,600 --> 00:00:22,700+Adom Fields found a real neck where the 5+V output entered its contact: 85 A/mm² on+a thin ring.++5+00:00:22,890 --> 00:00:30,600+Grok widened the copper and added vias,+and it dropped to 9.++6+00:00:30,770 --> 00:00:34,550+Here is the current flowing through the+new copper.++7+00:00:34,740 --> 00:00:39,000+With half the copper area, U1 now rises 24+°C, still under its 40 °C budget.++8+00:00:39,030 --> 00:00:46,100+EMC margin holds at 48 dB, and both rails+pass.++9+00:00:46,280 --> 00:00:47,800+Four low issues remain.++10+00:00:47,980 --> 00:00:51,050+Grok's first molecule.

@@ -0,0 +1,28 @@+{+ "video": "/adom/grok-bridge/render/first-ai-pcb/clips/06-molecule.mp4",+ "title": "Clip 6: Grok's first molecule",+ "poster": "/adom/grok-bridge/render/first-ai-pcb/clips/06-molecule.jpg",+ "chapters": [+  {+   "t": 0,+   "title": "The molecule standard"+  },+  {+   "t": 14.6,+   "title": "The J4 neck"+  },+  {+   "t": 30.8,+   "title": "Current and heat"+  },+  {+   "t": 39.0,+   "title": "EMC and power"+  },+  {+   "t": 46.3,+   "title": "Grok's first molecule"+  }+ ],+ "captions": "WEBVTT\n\n00:00:00.000 --> 00:00:03.400\nOne correction: Adom boards follow the\nmolecule standard.\n\n00:00:03.610 --> 00:00:12.200\nSo Grok reworked its board on its own\ncomputer: machine pins in all four\ncorners, machine contacts on the edges\ninstead of screw terminals, everything on\na 2 mm grid, and a 36 by 20 mm outline\nwith rounded corners.\n\n00:00:12.440 --> 00:00:14.400\nGrok added an enable contact so the\ncontrol panel can switch it off.\n\n00:00:14.600 --> 00:00:22.700\nAdom Fields found a real neck where the 5\nV output entered its contact: 85 A/mm\u00b2 on\na thin ring.\n\n00:00:22.890 --> 00:00:30.600\nGrok widened the copper and added vias,\nand it dropped to 9.\n\n00:00:30.770 --> 00:00:34.550\nHere is the current flowing through the\nnew copper.\n\n00:00:34.740 --> 00:00:39.000\nWith half the copper area, U1 now rises 24\n\u00b0C, still under its 40 \u00b0C budget.\n\n00:00:39.030 --> 00:00:46.100\nEMC margin holds at 48 dB, and both rails\npass.\n\n00:00:46.280 --> 00:00:47.800\nFour low issues remain.\n\n00:00:47.980 --> 00:00:51.050\nGrok's first molecule.\n"+}\ No newline at end of file

@@ -0,0 +1,44 @@+WEBVTT++00:00:00.000 --> 00:00:03.400+One correction: Adom boards follow the+molecule standard.++00:00:03.610 --> 00:00:12.200+So Grok reworked its board on its own+computer: machine pins in all four+corners, machine contacts on the edges+instead of screw terminals, everything on+a 2 mm grid, and a 36 by 20 mm outline+with rounded corners.++00:00:12.440 --> 00:00:14.400+Grok added an enable contact so the+control panel can switch it off.++00:00:14.600 --> 00:00:22.700+Adom Fields found a real neck where the 5+V output entered its contact: 85 A/mm² on+a thin ring.++00:00:22.890 --> 00:00:30.600+Grok widened the copper and added vias,+and it dropped to 9.++00:00:30.770 --> 00:00:34.550+Here is the current flowing through the+new copper.++00:00:34.740 --> 00:00:39.000+With half the copper area, U1 now rises 24+°C, still under its 40 °C budget.++00:00:39.030 --> 00:00:46.100+EMC margin holds at 48 dB, and both rails+pass.++00:00:46.280 --> 00:00:47.800+Four low issues remain.++00:00:47.980 --> 00:00:51.050+Grok's first molecule.