/challenges-projects/project14/sensors/b/blog/posts/light-up-coaster-using-touch-sensor-and-conductive-plaContinuing on the theme of my previous blog post Light up Coaster using sound sensor , this version of the Light up coaster includes a touch sensor based on the MPR121 capacitive touch, and 3D printed conductive pads all around the coaster which can.en-USTelligent Community 12