We've shown you how to turn a webcam into a security camera, but that can only take you so far. If you want a DIY option that gives you four cameras viewable from any web browser, MAKE has a project for you.This undertaking is not for the faint of heart. You won't have to build the cameras yourself or anything crazy like that, but you will need to create an entire system yourself from various parts and components. That said, you'll end up with a four-camera security system that will cost you less than a professional solution and offer up better quality. It will also be more flexible, and you'll have control over what it does should you want to upgrade it in the future or make any changes. If this sounds up your alley, check out the full how-to on MAKE.
Homemade Home Security [MAKE Projects]