You can make a camera trigger without a micro controller, but this system allows you to easily add sensors or variable timers, making it extremely flexible. [Thanks Haje]

There are loads of reasons for why you could want to trigger your camera remotely – to avoid camera shake, for example, or to be able to take a photograph of yourself without having to rely on a timer. If you want to build more ambitious projects, however, you may have to consider getting more exotic.

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Make: Arduino