Phil Harlow got tired of owning a kegerator and not being able to keep track of who drank how much. So he built a smart kegerator, which lets you not only share beer with your family and friends, but can tell you how much they owe (even though there are no cans or bottles to count):
Version 1.0 of the smart kegerator is powered by a Raspberry Pi that keeps track of your tab based on the price of the keg and the volume of the beer. Facial detection is only shown in the video, but Harlow says the latest version uses facial recognition so you don’t have to interact with the device at all. He plans to eventually use weight sensors under each keg to get a better estimation of keg volume and a liquid probe thermometer to better estimate the temperature of the beer.
Image Credit: Phil Harlow