Product Info
Video Clips

Digital Sundials International
 English   Deutsch   Español   Français   Italiano     


In 1991, Scientific American author Ian Stewart (based on a 1987 article by K. Falconer) hypothesized the possibility of a digital sundial in an article entitled "What in heaven is a digital sundial?" Inspired by this, the three inventors Hans Scharstein, Daniel Scharstein, and Werner Krotz-Vogel set out to make Stewart's fictitious clock a reality. The world's first prototype was constructed in the summer of 1994 in Germany, and the invention was patented in Germany and in the USA. The elegant designs of both large and small sundials were developed by artist and engineer Felix Scharstein, who joined the team in 1995.

The first digital sundial in a public place was erected in a sundial park in Genk, Belgium, in 1998. The digital sundial was also a semifinalist in Hammacher Schlemmer's 1997 Search for Invention contest. Two large public digital sundials can be found in Germany: one in the sundial exhibition in Germany's premier science museum, the "Deutsches Museum" in Munich; and one on the roof of the Kölnisches Stadtmuseum in Cologne, Germany. The first large digital sundial in the USA was erected in the summer of 2002 in front of the Corbin-Norton house on the corner of Ocean Park in Oak Bluffs, Martha's Vineyard.

Besides building large custom-made sundials, we also developed a small version of the digital sundial. It took many years to develop a production process with the necessary accuracy, but in 2001 we introduced our affordable indoor model, which is available for sale on this web site. For more information about large custom-made digital sundials, please send email to

Patent        Photos