The video introduces a unique, 3D-printed sundial that projects changing numbers throughout the day, similar to a digital sundial. The sundial was created by French inventor Julien Cohen and is open-source, meaning anyone can print, modify, or use it as they wish. The video also explains how to print the sundial, which requires ABS plastic due to its heat resistance and detail-oriented printing process.
The sundial works by projecting numbers onto a surface, with these numbers changing throughout the day as the sun's position changes. The sundial is divided into sections, each representing an hour of the day. The sun's movement causes shadows to fall on these sections, changing the numbers that are projected onto the surface.
The video also discusses a project in the Jequitinhonha Valley in Brazil, where there is a lack of clean drinking water. The video crew demonstrates the sundial in this context, showing how it can be used to understand the movements of the sun and the changing nature of time.
The video ends with a teacher demonstrating the sundial to her students, explaining how it works and how it can be used to teach about the Earth's movements and time zones. The teacher also talks about the importance of clean water and the challenges faced in the Jequitinhonha Valley.
In summary, the video showcases an innovative, open-source sundial that uses 3D printing and light projection to create a dynamic, time-telling device. It highlights the potential of such technology to improve understanding of scientific concepts in real-world, educational contexts.
1. The video showcases a unique sundial that projects numbers throughout the day, acting like a digital sundial.
2. The sundial was created by a Frenchman named Julien Cohen.
3. The sundial is open source, allowing anyone to print, modify, or do whatever they want with it.
4. The sundial is made from ABS plastic, which is more susceptible to heat and more difficult to print.
5. The resolution of the sundial is 0.1 millimeters, a much higher resolution than typically worked with.
6. Printing the sundial will take a significant amount of time and material, due to its high resolution and complexity.
7. The sundial comes in options for both the southern and northern hemispheres.
8. The sundial can be printed in two parts, depending on the user's preference or printer limitations.
9. The sundial is being tested in the Jequitinhonha Valley, a region in Brazil with limited access to clean water.
10. The sundial's working principle is based on the movement of the sun, projecting a shadow or light to form numbers.
11. The sundial's time can be adjusted by tilting it to match the user's geographical latitude and the position of the sun.
12. The sundial also allows for the setting of daylight saving time.
13. The Jequitinhonha Valley is part of the Brazilian semi-arid region, where water scarcity is a significant issue.