Capacitive Touch Proximity Touch Reference Design

The Touchless Button Reference Design can detect the approach of fingers and hands without physical contact using Renesas’ capacitive touch solution. The electrode detects the proximity of the finger via self-capacitance and turns on the LED. The demo solution is compatible with all types of Renesas capacitive touch CPU boards.

The Touchless Button Reference Design solves the problems of conventional technologies (infrared sensor, ultrasonic, etc.). With Renesas' touchless button design, all you need is an electrode; it is not affected by light, and it can be combined with other capacitive functions.

The design should be used for the following use cases:

• When you don't want to or cannot touch a surface (elevator buttons, etc.)
• When your hands are occupied (vending machines, etc.)
• When your hands are wet (refrigerators)
• Other items that you don't want to touch (smart toilets)