Technologist Randy Sarafan has documented how to make a useful yet simple intervalometer for Pentax SLR cameras. The purpose of an intervalometer is to automatically release the shutter regularly over fixed periods of time. Randy's model can also control whether or not the auto-focus reoccurs before every exposure. The whole project is made possible with an Arduino board and simple external circuitry, which makes the project accessible for almost everyone.
To get started with your own intervalometer, click here for Randy's instructions. And we're on twitter and Google+, so follow us for news and product updates as well.