Hi everyone, I am currently doing a project with a group of friends. The project requires us to build a palm reader which uses electrodes to read the hand's impedance and then do the things that the circuit was designed to do. My group's idea is to build a piano. We use the electrodes as the piano keys, so when a finger touches it, the finger will complete the circuit (with the palm as the reference point). However, we don't have any idea of how a circuit that contain an electrode looks like, especially if the electrode is aluminum tape (it is easily available and cheaper than most electrodes). So does anyone have a sample of a circuit that contains an electrode, or any reference I should go to? I tried looking in the internet but have found none so far. Thanks!