"I admit that I am fascinated by all the really cool things that people do with LEGO but sometimes I think that they have way too much time on their hands, but at least now they’ll have a Mindstorms powered LEGO clock.
It’s called Time Twister and it was created by Hans Andersson, who used two Mindstorms cores that are located behind the two center digits. These two cores then communicate wirelessly using Bluetooth in order to stay in sync.
Time Twister consists of two LEGO Mindstorms bricks communicating via Bluetooth. The master brick keeps track of the time and handles the minute digits. The slave brick handles the hour digits and the second indicator.
Each digit is made up of five layers with black and white tiles layed out in different patterns. Each layer can rotate 360 degrees before it hooks to the next layer. By twisting the top layer back and forth in a specific pattern, you can arrange the layers so that the desired digit is displayed.
I love time gadgets like this... Shame the project isn't available for download yet.