The esp32 micro-controller has built in capacity sensing inputs. I made this project super quick for my advanced electronics in music course. The esp32 ran a serial connection to MAX where custom code interpreted each one as an individual note. Around the same time I experimented with a high-end IMU sending UDP packets to MAX. The body was machined from a 2X4 and the plates were machined from circuit board material. I am looking forward to graduating and having more time to experiment with wacky instrument designs. Only a couple more months to go…