Flux capacitor

The flux capacitor is the fictitious core component of Doctor Emmett Brown's time travel De Lorean DMC-12 in the 1985 movie Back to the Future, its two sequel, and the animated series. Brown states that the flux capacitor "is what makes time travel possible." It is not made clear in the movie exactly how the flux capacitor works. It consists of a box with three small, flashing incandescent lamp arranged as a "Y", located above and behind the passenger's seat of the time machine. As the car nears 88 miles per hour, the light of the flux capacitor pulses faster until it has a steady stream of light. The stainless steel body of the De Lorean also has a beneficial effect on the "flux dispersal" as the capacitor activates, although Doc is interrupted before he can finish explaining it fully. At the end of the third film in the series, when Doc Brown has converted a locomotive into a time machine, the flux capacitor is located on the front of the train, in place of the lamp. On... full article at wikipedia