An Interesting Clock. A 3D Pen Project (no costumes) Each digit is formed by 5 triangular prisms that then rotate in the shortest direction to form the next digit. Watch, then <Space> key to start/stop the seesaw. You can see all the triangular prisms turn at once in the second after 09:59:59 or 12:59:59 Inspired by a YouTube video by Hans Andersson "Time Twister 5 - 3D Printed Digital Clock" https://www.youtube.com/watch?v=4hC9oUYxssE He made a real world working clock like this using an Arduino Mega programmable circuit board, micro server motors, and many parts including a lot of 3D printed parts.
See also Sliding Bars Digital Clock: https://scratch.mit.edu/projects/1257729010/ Some Programming Notes ==================== - There are two types of triangular prism, Prism 1 with faces for rows 1,3,5 of a digit, Prism 2 for rows 2,4. There is a Help sprite inside that shows the prism faces of the two prism types that can form any digit. - Each triangular prism always rotates via the shortest direction to show the face for the next digit. The lists "Angles of 5 Prisms for each Digit (0-9)" and "Y Rotation for Triangular Prism" are used to calculate these shortest directions which are stored in the list "Rotation Direction for Triangular Prism" for 30 prisms. The project calculates and stores the X Y Z coordinates for the prism rotation angles 0, 10, 20 ... 330, 340, 350. This is more efficient than recalculating the coordinates for every 10 degree rotation. Inspired by a YouTube video by Hans Andersson "Time Twister 5 - 3D Printed Digital Clock" https://www.youtube.com/watch?v=4hC9oUYxssE He made a real world working clock like this using an Arduino Mega programmable circuit board, micro server motors, and many parts including a lot of 3D printed parts.
