Photoduino is an open-source driver for cameras based on the Arduino platform. Its main purpose is to serve as technical support for taking photographs of various techniques such as: Timelapse, High Speed Photography, Photography of insects and animals, or storms, HDR, among others.
The circuit containing the electronic control is capable of auto focus and the shutter of a camera and shot up two flashes manuals. It also has a sound sensor, an impact sensor, a laser barrier infrared barrier that can be used to take pictures when you register an event.
Photoduino: a camera-controlling Arduino shield – [Link]