Spotted in the MAKE Flickr pool, a nifty laser “sundial,” controlled by an ATtiny24 MCU and a servo:

An Atmel ATtiny24 microcontroller drives an R/C servo which in turn rotates a line LASER taken from a LASER level.

The microcontroller runs a software real time clock and turns the servo and the line LASER to mimic the shadow cast from the style of a sundial as the time goes.

XXI century sundial – Now for Arduino also!