TTP229 Touch IC is a capacitive type Touch button keypad. This is a 16 switch based easy to use capacitive touch sensing module, This 16 switch digital touch sensor module is based on a touch sensing IV TTP229. This device has a built-in regulator for the touch sensor. We can add interfaces through the non-conductive dielectric material. The module has two working modes. An 8 Key mode that provides an independent 8 channel output. Another one is 16 key mode which provides 16 channel output with an I2C interface.