Build a Pocket Sized Wifi Detector

We’ve all piggybacked on someones wifi before, but who wants to carry a bulky laptop around trying to find a connection Give yourself a sixth sense by building a pocket sized wifi detector which beeps in frequencies based upon signal strength. You can actually buy tee shirts that do this, but it’s way more fun to build your own. Of course, if you’re on the receiving end, and someone is stealing your wifi, you could always screw with their browser. See a quick demonstration of how it works: