Serpina is a so-called rolling ball clock. These clocks are working without a pendulum. Instead of the pendulum a ball is rolling down an inclined plane, for which it takes 20 seconds. Then the Seesaw tends to the opposite direction and the process begins again.
This clock type is relatively unknown although the first examples were built in the 17th century. Serpina was inspired by the design of Sir William Congreve from the early 19th century.
These clocks are popular collectors' items. It makes just fun to watch the ball, rolling down his way and then to see how the Seesaw starts the process all over again. It was not without reason that these clocks were formerly in shop windows to impress pedestrians. Your friends and visitors will be impressed, too.
Rolling ball clocks are primarily great entertainers. Although Galileo Galilei already discovers, that a ball needs on an inclined plane always the same time for the same distance. In practice, however, all rolling ball clocks have a problem with the accuracy, because dust on the seesaw destroys the theory.
The name Serpina is a modification of serpentine and refers to the path traveled by the ball when rolling down the seesaw.
Serpina is driven by a small motor which eliminates the process of winding the clock. Basically, she can run forever without any winding. At least as long as there is no power failure ;-)
Another advantage of the electric drive is the compact design. The clock fits perfect on a shelf or a sill.
You don't have to be an electrician to build this clock. The clock runs with safe direct current and in the plans is exactly described how everything must be connected. Additionally I have documented the build very well in the following movie.