Everyone knows how the typical sundial works, but inventor Mojoptix has invented a 3D-printed evolutionary version that actually shows a shadow of a functioning digital clock, with no batteries or moving parts required. Instead a clever arrangement of light paths create the display as light travels through it.
The sundial is a great example of how 3D printing is making some projects possible that would be very difficult to prototype otherwise. The design does have its limitations, in that it only tells the time in 20 minute increments, and it only works from 10 AM to 4 PM each day. But the design works, and the resulting time display is very easy to read. Mojoptix explains the theory behind his invention in the video below. You can see it working at about the 13:00 mark.
You can buy this interesting digital sundial from Mojoptix’s Etsy shop. And if you want to do it yourself, you can find out more information and DIY steps on Thingiverse.
