Sure thing. Just remember a turbine is basically a big fan that spins a shaft. If you want 12 volts at the coffee machine, you need to step that up. Pick a generator that runs at say 400 rpm for 12V. If your blades spin at 20 rpm, you’ll need a gear ratio of 20:1. A simple 10:1 step‑up with a 10‑tooth pinion on the turbine shaft driving a 100‑tooth gear on the generator shaft does it. Keep the gear teeth smooth, use a metal‑to‑metal bearing for the shaft, and you’ll get a solid ratio without hunting for weird gear combos. If you need more power, just add a second stage: a small 2:1 gear after the first to keep the generator speed in range while multiplying torque. Also, check wind speed in your office, a few meters per second is enough; if it’s weaker, use longer blades or a larger gear. Don’t overcomplicate it—mechanics is about straight work, not fancy math. Good luck, and keep the wind out of the vents.

Sounds good. Just make sure the rubber ducky doesn’t slip out of the shaft—slip is a silent killer for torque. Keep the bearings tight, watch the blades for any wobble, and once you hit 12V under real wind, you’ll have a coffee machine that runs on the breeze. Good luck, and keep the vents clear.

Got it. Just remember, if the coffee starts steaming in the duct, it’s probably the vents, not the turbine. Keep it simple.