It’s a simple oscillator circuit tailored to create a magnetic field around a water pipe to perform water conditioning.

An Arduino micro measures the weight on the load cell, and with the known densities of gin, vermouth, and Kahlua, [Tony] can get a very good idea of how much liquid is in the cocktail shaker.

Radio World readers may know Marty Acuff from his time at Orban/CRL Labs or from his many yers working on the iconic Sutro ...