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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!

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.


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