The cap2serial board will convert 8 home built (custom) capacitive sensors into serial data that can be read over RS-485 by using a simple set of commands. A large variety of different sensors can be hand made,
including angular position, linear position, water level, soil moisture, etc.
The following are available for download:
Example Script and program Files
OpenScad file for tube shaped linear position sensor
files to make angular position sensor for telepresence glove
YouTube videos are available on my channel:
The Cap2serial board is available for purchase at:
Some sensors, such as the soil moisture sensor
and the finger touch sensor,
can be hand made from very inexpensive materials. More complex sensors can be made on a 3D printer using conductive PLA with insulators made from ordinary PLA plastic.