Automatic machine for the deposit and withdrawal of cash, assisted by operator, comprising an input port for a bundle of banknotes, a separating device for the bundle of banknotes, a validation device for banknotes separated from the bundle, an output port and an inputoutput opening for a recycling store. The metadata are analyzed to determine an anatomic region represented by the study. They additionally may use surface-area, rather than solely pressure, differentials to produce rotary motion. Each metal oxide buffer layer acts to improve capacitance and reduce capacitor leakage.