Capacitive Touch Hardware Design Guide

Abstract

Capacitive touch detection is sometimes considered more art than science. This often results in multiple design iterations before the optimum performance is achieved. There are, however, good design practices for circuit layout and principles of materials that need to be understood to keep the number of iterations to a minimum. This design guide describes a process for creating and designing capacitive touch solutions, starting with the schematic, working through the mechanicals, and finally designing the electrodes for the application.