3D Printed Whiteboard Clock Writes Out Current Time

21-year-old software engineer Maurice Bos has built a mechanical clock that writes the current time on a whiteboard every minute, each time erasing the previous time.

Bos, who works for Google in Zürich, built the clock using a 3D printed arm to grasp a whiteboard pen. The pen, receiving instructions from a tiny microcontroller, is responsible for both writing the current time each minute and erasing the previous one, with the help of a detachable wiping attachment that fits over the nib.

Bos has posted a detailed summary of how his whiteboard clock works here.

Source: The Next Web