> I've recently got a couple of cheap laser pointers. > > And I was wondering if there is a way to measure distance with them? Yes, but there's a "little" work involved This commercial site has some good background info on preferred methods for different ranges. For example time- of-flight for long distances, phase or frequency shifting for short distances. You can get to the datasheets for their sensors too http://www.acuityresearch.com/products/lasers-explained.shtml and http://www.laser-components.com/Products/pdf/rangefinder1.pdf etc through Google -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.