12 V to 5 V / 1 A Buck Molecule (TPS54202)

@@ -1,6 +1,6 @@ # AI Flow run: claude-opus-5.5 on board-0 -**Running**: step `nets`, 220.2 min of AI time since the prompt (738.0 min on the wall clock). This page updates at every step change.+**Running**: step `silkscreen`, 224.4 min of AI time since the prompt (759.7 min on the wall clock). This page updates at every step change.  Prompt at 2026-09-29T00:39:00Z (UTC). Flow: board. Every number here is from the run's append-only ledger (run.jsonl). AI time is the time the AI was working on a prompt: from the human's prompt to the AI's done, with any gap over 15 min where no command ran (unobserved, not proven idle) cut out. @@ -10,8 +10,8 @@ One row per human prompt: the AI's time on it, unobserved gaps excluded by the h  | Session | Prompt at | Done at | AI time min | Unobserved gap min | What | |---|---|---|---|---|---|-| 1 | 2026-09-29T00:39:00Z | (open) | 220.2 | 518 | the first prompt |-| **all** | | | **220.2** | | |+| 1 | 2026-09-29T00:39:00Z | (open) | 224.4 | 535 | the first prompt |+| **all** | | | **224.4** | | |  ## Per step @@ -21,7 +21,7 @@ AI time only, the idle cut out. |---|---|---|---|---|---|---|---| | intake | 92.9 | 91.9 | 1.0 | 4 | 1 | 0 | 90.9 min | | placement | 14.9 | 4.3 | 10.6 | 11 | 1 | 0 | 2.3 min |-| routing | 63.3 | 0.0 | 63.3 | 4 | 1 | 1 | 0.0 min |+| routing | 65.8 | 0.0 | 65.8 | 4 | 1 | 1 | 0.0 min | | pours | 6.1 | 0.0 | 6.1 | 27 | 2 | 1 | 0.0 min | | current | 0.1 | 0.0 | 0.1 | 6 | 1 | 0 | 0.0 min | | thermal | 11.5 | 0.0 | 11.5 | 14 | 2 | 0 | 0.0 min |@@ -29,9 +29,10 @@ AI time only, the idle cut out. | fields | 9.0 | 0.0 | 9.0 | 3 | 1 | 0 | 0.0 min | | libraries | 11.4 | 8.6 | 2.9 | 1 | 1 | 0 | 8.6 min | | models | 6.3 | 5.4 | 0.9 | 3 | 1 | 0 | 5.4 min |-| nets | 0.0 | 0.0 | 0.0 | 1 | 1 | 0 | 0.0 min |+| nets | 1.7 | 0.0 | 1.7 | 3 | 1 | 0 | 0.0 min | | other | 0.0 | 0.0 | 0.0 | 1 | 0 | 0 | 0.0 min |-| **total** | **220.2** | **114.6** | **105.6** | | | | |+| silkscreen | 0.0 | 0.0 | 0.0 | 2 | 1 | 0 | 0.0 min |+| **total** | **224.4** | **114.6** | **109.8** | | | | |  ## Returns to earlier steps @@ -55,6 +56,12 @@ AI time only, the idle cut out. - 2026-09-29T12:45:51Z artifact analysis-image for thermal-2: Heat flow in each copper layer: U1's 0.25 W leaves through its GND pin and two thermal vias into the bottom plane - 2026-09-29T12:45:51Z artifact analysis-image for thermal-2: Temperature rise, still vs moving air: U1 +44 / +24 C, L1 +41 / +21 C; 55 C junction-based budget (area-limited board) - 2026-09-29T12:57:01Z clip-start:nets-1+- 2026-09-29T12:57:05Z net GND: 137 items highlighted+- 2026-09-29T12:57:10Z net SW: 33 items highlighted+- 2026-09-29T12:57:15Z net VIN: 40 items highlighted+- 2026-09-29T12:57:20Z net VOUT: 56 items highlighted+- 2026-09-29T13:17:08Z clip guard: the nets clip ran 20 min, past its 10 min budget twice over; stopped by the guard+- 2026-09-29T13:18:41Z clip-start:silkscreen-1  ## Where the board stands @@ -213,15 +220,29 @@ What this step does: walk the key nets on camera: each loaded, wide or Kelvin ne  ![the board when nets began](/blob/app/buck-12v5v-molecule/docs/runs/buck-12v5v-molecule-claude-opus-5-5-20260929-0039/shot-nets-1-start.png) +**Screenshot: the board when nets ended.**++![the board when nets ended](/blob/app/buck-12v5v-molecule/docs/runs/buck-12v5v-molecule-claude-opus-5-5-20260929-0039/shot-nets-1-end.png)++### silkscreen++What this step does: Make both faces useful in real service: references and values, verified connector and machine-contact pinouts, polarity, board identity and bring-up labels; review native plots and assembled visibility. Offer the optional shared silkscreen dashboard: real solver events, candidate reasons, live/replay separation, fitted-model inspection and separately recorded detailed/5s replays. Audit every fitted body and every via/hole across the whole board, both faces, with coverage counts. Missing Fab geometry is not free space; native DRC does not establish fitted visibility. Keep unresolved labels explicit and do not apply an incomplete layout. Native geometry/edit/undo/refresh belongs to the EDA bridge.++**Clip: silkscreen, still recording (started 2026-09-29T13:18:41Z); it appears here when the step ends.**++**Screenshot: the board when silkscreen began.**++![the board when silkscreen began](/blob/app/buck-12v5v-molecule/docs/runs/buck-12v5v-molecule-claude-opus-5-5-20260929-0039/shot-silkscreen-1-start.png)+ ## Plan usage, the second cost line  Percent of each plan limit used, as the provider reports it, at the start of the run and at its end.  | Provider | Limit | At start | At end | Used by this run | |---|---|---|---|---|-| claude | 5h | 4 % | 6 % | 2.0 % |+| claude | 5h | 4 % | 8 % | 4.0 % | | claude | Fable | 0 % | 0 % | 0.0 % |-| claude | week | 7 % | 10 % | 3.0 % |+| claude | week | 7 % | 11 % | 4.0 % | | codex | week | 2 % | 5 % | 3.0 % |  *The limits are per account, not per run: every AI thread signed in as this user draws on the same numbers, so a run made while other threads were working shows their usage too. Read it as an upper bound unless this run was the only thread active.*