project
12 V to 5 V / 1 A Buck Molecule (TPS54202)
Public Unreviewedby John Lauer
An independently designed 12 V to 5 V, 1 A synchronous buck molecule (TI TPS54202), with calculations, ngspice and PSpice simulation, KiCad 10 schematic and board, and the board laid out and analysed with adom-aiflow.
← Commit history
clips: 9 clip(s)
4 files changed
+53−29
docs/clips.md+53−29@@ -2,35 +2,51 @@ Every step of the adom-aiflow run records its own clip of the KiCad window on the test box. This page is appended as each clip lands, so it can stay open in a browser tab while the build runs. -Last updated 2026-09-29 13:29 UTC. 7 clip(s).+Last updated 2026-09-29 14:22 UTC. 9 clip(s). | # | step | recorded | clip | state | |---|---|---|---|---|-| 1 | Placement (and the first traces) | 2026-09-29 02:34 UTC | [10x cut](#clip-1) | ok |-| 2 | Routing landed, first pours | 2026-09-29 02:57 UTC | [10x cut](#clip-2) | see note |-| 3 | Fields walkthrough (Adom Fields app) | 2026-09-29 12:52 UTC | [10x cut](#clip-3) | ok |-| 4 | Routing rework (back from the current analysis) | 2026-09-29 11:56 UTC | [10x cut](#clip-4) | ok |-| 5 | Pours rework (back from the Fields solve) | 2026-09-29 12:11 UTC | [10x cut](#clip-5) | ok |-| 6 | Thermal analysis, SW throat widened | 2026-09-29 12:43 UTC | [10x cut](#clip-6) | ok |-| 7 | Net walkthrough (GND, SW, VIN, VOUT) | 2026-09-29 12:57 UTC | [10x cut](#clip-7) | ok |--### Clip 1: Placement (and the first traces)+| 1 | 3D walkthrough (KiCad 3D viewer) | 2026-09-29 14:13 UTC | [10x cut](#clip-1) | ok |+| 2 | Placement (and the first traces) | 2026-09-29 02:34 UTC | [10x cut](#clip-2) | ok |+| 3 | Routing landed, first pours | 2026-09-29 02:57 UTC | [10x cut](#clip-3) | see note |+| 4 | Fields walkthrough (Adom Fields app) | 2026-09-29 12:52 UTC | [10x cut](#clip-4) | ok |+| 5 | Routing rework (back from the current analysis) | 2026-09-29 11:56 UTC | [10x cut](#clip-5) | ok |+| 6 | Pours rework (back from the Fields solve) | 2026-09-29 12:11 UTC | [10x cut](#clip-6) | ok |+| 7 | Thermal analysis, SW throat widened | 2026-09-29 12:43 UTC | [10x cut](#clip-7) | ok |+| 8 | Net walkthrough (GND, SW, VIN, VOUT) | 2026-09-29 12:57 UTC | [10x cut](#clip-8) | ok |+| 9 | (not yet described) | 2026-09-29 14:12 UTC | [10x cut](#clip-9) | ok |++### Clip 1: 3D walkthrough (KiCad 3D viewer) <a id="clip-1"></a> +Recorded 2026-09-29 14:13 UTC. 31 View-menu commands, no mouse: the bottom identity silkscreen, tilted and close views with the contact and probe labels, the side view with the medium machine pins under the board, and the top view.++<video src="docs/clips/window-3933648-20260929-141309-10x.mp4" controls muted playsinline></video>++Motion-only action cut: [docs/clips/window-3933648-20260929-141309-action.mp4](clips/window-3933648-20260929-141309-action.mp4)++Contact sheet (nine frames): ++Raw recording: `window-3933648-20260929-141309.mp4`, 52 MB, kept with the run (not uploaded).++### Clip 2: Placement (and the first traces)++<a id="clip-2"></a>+ Recorded 2026-09-29 02:34 UTC. The 24 parts parked in a row below the outline land on the molecule one at a time, each its own KiCad undo step; the first traces appear at the end. <video src="docs/clips/window-461694-20260929-023413-10x.mp4" controls muted playsinline></video> Motion-only action cut: [docs/clips/window-461694-20260929-023413-action.mp4](clips/window-461694-20260929-023413-action.mp4) -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-461694-20260929-023413.mp4`, 984 MB, kept with the run (not uploaded). -### Clip 2: Routing landed, first pours+### Clip 3: Routing landed, first pours -<a id="clip-2"></a>+<a id="clip-3"></a> Recorded 2026-09-29 02:57 UTC. The 48 routed traces on the board, then the first pours filling (GND on both layers, VIN and VOUT on top). @@ -38,13 +54,13 @@ Recorded 2026-09-29 02:57 UTC. The 48 routed traces on the board, then the first <video src="docs/clips/window-461694-20260929-025743-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-461694-20260929-025743.mp4`, 1110 MB, kept with the run (not uploaded). -### Clip 3: Fields walkthrough (Adom Fields app)+### Clip 4: Fields walkthrough (Adom Fields app) -<a id="clip-3"></a>+<a id="clip-4"></a> Recorded 2026-09-29 12:52 UTC. The Fields app walks the solved board: heat flow in each copper layer in 3D with the vias, the bottom ground plane, temperature in still air (+44 C at U1) and moving air (+24 C), and current density. 0 issues against the 55 C budget. @@ -52,37 +68,37 @@ Recorded 2026-09-29 12:52 UTC. The Fields app walks the solved board: heat flow Motion-only action cut: [docs/clips/window-4852048-20260929-125229-action.mp4](clips/window-4852048-20260929-125229-action.mp4) -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-4852048-20260929-125229.mp4`, 181 MB, kept with the run (not uploaded). -### Clip 4: Routing rework (back from the current analysis)+### Clip 5: Routing rework (back from the current analysis) -<a id="clip-4"></a>+<a id="clip-5"></a> Recorded 2026-09-29 11:56 UTC. FB and VOUT come off the bottom layer under the input hot loop; the feedback column (R1, R2, C9) is turned 180 degrees so it reads VOUT, R1, FBM, R2, FB; the LED moves beside the output; the VOUT sense re-routes along the top edge. <video src="docs/clips/window-593052-20260929-115650-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-593052-20260929-115650.mp4`, 463 MB, kept with the run (not uploaded). -### Clip 5: Pours rework (back from the Fields solve)+### Clip 6: Pours rework (back from the Fields solve) -<a id="clip-5"></a>+<a id="clip-6"></a> Recorded 2026-09-29 12:11 UTC. SW patch from U1 to the inductor, solid ground at U1's GND pin with thermal vias, the stray SW vias and corridor GND vias removed, every zone refilled. <video src="docs/clips/window-593052-20260929-121139-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-593052-20260929-121139.mp4`, 87 MB, kept with the run (not uploaded). -### Clip 6: Thermal analysis, SW throat widened+### Clip 7: Thermal analysis, SW throat widened -<a id="clip-6"></a>+<a id="clip-7"></a> Recorded 2026-09-29 12:43 UTC. The board while the current and thermal gates ran; the SW patch opened right after U1's SW pin and the pours were re-landed (peak current density 215 to 50 A/mm2 over the rework). @@ -90,19 +106,27 @@ Recorded 2026-09-29 12:43 UTC. The board while the current and thermal gates ran Motion-only action cut: [docs/clips/window-593052-20260929-124348-action.mp4](clips/window-593052-20260929-124348-action.mp4) -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-593052-20260929-124348.mp4`, 344 MB, kept with the run (not uploaded). -### Clip 7: Net walkthrough (GND, SW, VIN, VOUT)+### Clip 8: Net walkthrough (GND, SW, VIN, VOUT) -<a id="clip-7"></a>+<a id="clip-8"></a> Recorded 2026-09-29 12:57 UTC. Each key net selected as a whole in KiCad (pours, tracks, vias and pads together) and framed with Zoom to Selection: GND (137 items), the SW patch from U1 to the inductor (33), VIN (40), VOUT (56). <video src="docs/clips/window-593052-20260929-125701-10x.mp4" controls muted playsinline></video> -Contact sheet (nine frames): +Contact sheet (nine frames):  Raw recording: `window-593052-20260929-125701.mp4`, 189 MB, kept with the run (not uploaded). +### Clip 9: (not yet described)++<a id="clip-9"></a>++Recorded 2026-09-29 14:12 UTC. ++Raw recording: `window-724124-20260929-141234.mp4`, 59 MB, kept with the run (not uploaded).+
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