Digital Sundial

This interesting sundial shows the time thanks to digits and it is not using electric power. The sunlight is cast all the way through a pair of specially made masks in the form of digits that will display the present time of day. All you need to do is to position it on the south-facing window (north-facing in the southern hemisphere), and read time over the horizontal mirror.

digitalsundial.com  via-lastsurfer.blogspot.com