Horizontal Sundial for Any Latitude
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Horizontal sundial: hour lines computed from tan θ = sin φ · tan(15°·h). Set your latitude; 40° and 35° included.
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Updated at source:
Model information
- Source
- Printables
- Category
- Physics & Astronomy
- License
- Creative Commons — Attribution — Noncommercial — NoDerivatives
Horizontal sundial: hour lines computed from tan θ = sin φ · tan(15°·h). Set your latitude; 40° and 35° included.
Ø150 dial, hours 6-18
Gnomon angle equals the latitude
Included: 40.4° N (Madrid) and 34.7° N (Osaka)
How it was checked
Hour-line angles come from the standard horizontal-dial formula. Checked with an overhang audit of the mesh and sliced in Bambu Studio: no supports needed.
Print settings
A1 mini, 0.20 mm, PLA, no supports: 1 h 35 min, 53 g + 1 h 30 min, 52 g.
It shows local solar time: point the 12 towards true north and level it.
Parametric OpenSCAD source included: change the values at the top of the file.
About this design
Designed in code and checked before release (see above); sliced in Bambu Studio. Pictures are 3D renders, not photos. This is a new design: makes and feedback are very welcome.
Español
Reloj de sol horizontal para cualquier latitud. Sin soportes: 1 h 35 min, 53 g + 1 h 30 min, 52 g.
العربية
مزولة شمسية أفقية لأي خط عرض.