arduino - Homemade shielding of a wire to a capacitive sensor - Electrical Engineering Stack Exchange
Capacitive Touch Switch Button RGB Multi Color LED Sensor Module 2017 New DIY Electronic HTTM|diy electronic|electronic diyelectronic module - AliExpress
Capacitive Sensing for Dummies : 7 Steps - Instructables
Project 06 - DIY Touch sensor for Arduino under 1$ - YouTube
Circuits and Techniques for Implementing Capacitive Touch Sensing - Technical Articles
Mechanical buttons to capacitive sensing—A step-by-step guide-Part I - EDN