Sure, lay it out. I’ll check the power draw, heat, and how you’re randomizing the soundtrack. Just remember LEDs prefer a steady supply, not a wild battery tantrum. Show me the specs.

Sounds almost ready, but let’s audit a few quirks. Sixteen‑cell packs can spike, so make sure the voltage regulator on the driver is rated for 12.6 V full charge; otherwise you’ll see dimming in the first few seconds. A 1‑inch heat sink with a fan is fine, but 2 W on a driver that’s only a tiny fraction of your total draw means the rest of the circuitry is likely running hot too – watch the MCU voltage regulator. Pulling randomness from ADC noise is clever, but SD card access speed is usually the bottleneck, so your “random” track might lag behind the LED flicker. Finally, the Hall sensor tweak is a neat idea, but you’ll want a debounce logic so you don’t flip the sequence every millisecond as the battery drops. All in all, good, just tidy up those edge conditions.