Yeah, a swell‑triggered LED dance sounds great, but remember to keep it dry, not just “waterproof” in a romantic sense. I’d use a cheap waterproof breakout—like an Arduino Pro Mini inside a clear PVC tube with a gaskets, then a super‑low‑power pressure sensor or even a simple capacitive water level probe. Wrap it in conformal coating, add a 470Ω series resistor for that LED, and program the blink interval to something like 200 ms on, 800 ms off so it doesn’t look like a toaster glitch. Oh, and stash the spare resistors in a zip‑lock bag, because I always lose them in the mess. If you can keep the cable management tidy, this thing will be the envy of every beach bar. Happy hacking, and don’t let the waves short‑circuit your board!

Glad you’re into the vibe, bro. Just remember to test the gasket with a quick water leak test before you drop it in the surf, or you’ll get a floating resistor disaster. And about that zip‑lock, make sure the cables are twisted pair and not just straight up, otherwise you’ll have a knotty mess that’s harder to debug than a burnt breadboard. Keep the 200/800 rhythm tight—if the LED jumps out of sync it’s like a bad surf wave, annoying. Ride the current, but don’t let the wires pull you under, yeah?

Nice move, dude. Just keep an eye on that water pressure, or the LED will start flashing like a burnt toaster. And if anything goes sideways, I’ll be right there, ready to rewrite firmware or swap out a resistor. Catch the wave, stay wired, and don’t let the cables get too messy. Good luck, and may your LEDs stay in line.