It's always a pleasure to see Kickstarter projects that not only ship on time, but show a brilliant use of the sensors built into every iOS device. In the case of the Vaavud wind meter (US$49.99), the product uses the magnetic field sensor to pick up the fluctuations caused by the rotation of magnets driven by the wind's pressure on two small anemometer cups.
It's a clever design, as this means that the Vaavud contains no electronics at all. In fact, when I first opened the box and pulled out the Vaavud provided by BiteMyApple.co, I was surprised to see that the audio jack on the device that plugs into the iPhone's headphone minijack was made entirely of plastic. It was only after I read that the main purpose of the
