Saint-Hubert is a municipality located in the Belgian province of Luxembourg. On January 1st, 2002 Saint-Hubert had a total population of 5,646 (2,745 males and 2,901 females). The total area is 112.21 km² which gives a population density of 50.32 inhabitants per km².
... rev counters and light emitting diodes powered by a little generator embedded in the gyroscope.
The physics of this device looks confusing at first sight, but ...