Particles jiggle with Brownian noise. A lopsided sawtooth potential flashes on and off. While it is on they slide into its wells; while it is off they spread freely.
Use FLASHING to compare flashing against always-on. Tap to flip the potential by hand. The same ?seed= always gives the same run.
LITThe flashing Brownian ratchet (Ajdari & Prost 1992; Astumian). Particles must stay finite, or the page throws.
AMBERThe motor is powered by the flashing (work put in), not by the noise alone. No second-law violation is claimed.