Zero - Arduino Try Out. From the circuit diagram of the module, it is clear that, apart from the module only a few external components are needed to build a relay-driver circuit. Yes, there is a ...

The idea for a two-dimensional force map came from one of [chris.coulson]’s classmates, an amputee who developed a single-channel pressure sensor to help him solve a painful fitting problem.

A flex sensor is a different category of sensor, where the resistance changes depending on the extent of the flex or "bend". Such changes can be read as electrical signals on the Arduino's input pin.