This is Disck touch keypad function by measuring the capacitance of 15 electrode points. 3 key points and 12 radial points.
This compact inexpensive keypad, can connecting to any Capacitive module. In our catalog you can find 16 Keys Capacitive touch module which base on TTP229 and connecting to microcontroler with I2C bus.
This touch keypad, is both an ideal learning tool for capacitive touch sensing keypads, as well as a fully operational touch keypad that can be easily incorporated in a professional control system or microcontroller application.
Disk touch pad have radial points from 1 to 15, and can mark with marker-pan.
In set: board and jumper wire for 15 lines. 150mm (6 inch) long.