Google Antigravity

@@ -119,3 +119,13 @@ Argon's first silkscreen audit passed on made-up geometry: every part a 0.4 mm s ::adom-video{src="/adom/antigravity/render/first-ai-pcb/videos/clip13.video.json"}  With the capacitor models turned the right way up, every check on aiflow's finish line passed: routing, design rules, current, heat, silkscreen and 3D. The export was checked against the board itself: Gerbers for both copper layers, a drill file with 72 holes, a 14-line bill of materials and placement for 33 parts. One budget moved on the way: the switch-node length went from 12 to 24 mm during routing, and it stays on the record. Length 34 s.++## Revision 2++Argon applied its own review in a new aiflow run: the circuit is proven before any copper is placed.++## Clip 14: rev 2 proves its circuit first++::adom-video{src="/adom/antigravity/render/first-ai-pcb/videos/clip14.video.json"}++Argon read Samsung's measured DC-bias curves: the 22 µF / 10 V output capacitors keep only 29 % at 5 V (6.4 µF each), so it added a fourth (25.6 µF effective) and cut the feedforward capacitor from 68 to 47 pF, keeping the loop crossover at 36 kHz, under TI's 40 kHz limit with 94° of phase margin. The inductor question was resolved from TI's own guidance: 15 µH is TI's recommended value for 5 V out on this part. A damped 47 µF / 35 V electrolytic now sits on the input: in simulation, a 16 V hot-plug through 1 µH of leads that rang to 31.2 V without it peaks at 17.4 V. Start-up takes 4.6 ms and a 0.5 to 1 A load step dips 83 mV (limit 150 mV), matching TI's reference model within about 10 %. Length 32 s.

@@ -0,0 +1,6 @@+{+  "video": "/adom/antigravity/render/first-ai-pcb/videos/clip14.mp4",+  "title": "Rev 2 proves its circuit first",+  "poster": "/adom/antigravity/render/first-ai-pcb/videos/clip14.jpg",+  "captions": "WEBVTT\n\n00:00:00.500 --> 00:00:02.776\nRevision two starts with the circuit.\n\n00:00:02.826 --> 00:00:16.341\nArgon read Samsung's measured DC-bias curves: its output capacitors keep only twenty-nine percent at five volts, so it added a fourth and cut the feedforward capacitor to hold the loop under TI's forty kilohertz limit.\n\n00:00:16.391 --> 00:00:20.217\nOn the input it added a damped forty-seven microfarad electrolytic.\n\n00:00:20.267 --> 00:00:29.907\nIn simulation, a sixteen volt hot-plug that rang to thirty-one volts now settles at seventeen, and start-up and the load step stay inside their limits.\n\n00:00:29.957 --> 00:00:31.070\nThen the board.\n"+}\ No newline at end of file