Universal Sundials
This part is examples of sundials. Each example consists geometrical explanation, calculation and use of my open-source software developed for design of sundials. You can download them from GitHub. https://github.com/AminKH/SunDials In this section universal sundials are discussed. These sundials regarding, designed for solar time, can be installed any place , only their plane should be adjusted to proper angle. Equatorial Sundial Armillary Sundial Polar Sundial Equatorial Sundial Dial plate of this sundial as it is implied by its name, is parallel to the Earth equatorial plane. Gnomon is a rod normal to dial face. Picture below shows an equatorial sundial and various planes, including equatorial plane, at earth surface. The sundial in the picture is at this place: https://www.atlasobscura.com/places/cranmer-park-sundial This kind of sundial, as Kehui Deng claims, had been in use in ancient China. Karlheinz Schaldach from remains of probably a sundial at t...