Capacitive touch sense solution

Touch-sensitive switches are found in a variety of consumer products including home appliances, MP3 players and cellphones. The technology behind these switches has been available for many years, but the demand for smaller products has made these switches a popular choice for manufacturers.

The application note from Silicon Laboratories Inc. describes how a touch-sensitive switch is created using a relaxation oscillator. This section also describes how to add single and multiple switches to a system and the different firmware methods for detecting a switch event.

View the PDF document for more information.