Designer Mojoptix has unveiled a cleverly designed 3D-printed sundial that uses no electronics at all. With only a carefully arranged set of pinholes, the device automatically casts the correct time (in 20-minute intervals) as a shadow below.
Each slat in the sundial’s arm corresponds to a particular angle of the sun’s rays through the day. Where the light hits the slats determines which rays get cast as shadows and which appear as pixelated numbers making up the time.
Customers can purchase either a Northern or Southern hemisphere model and Mojoptix says the arm can even rotate to accommodate Daylight Saving Time.
However, the clock only works between 10 a.m. and 4 p.m., so it’s not the best timekeeper. But it’s still very awesome.