[Gord Payne] has one with an elegant sensor solution, it detects finger movement using a light dependent ... and with a simple divider circuit a voltage can be read by an Arduino.

If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller that lights an LED to alert the user when it is time to water a potted ...

Finger Bend is a unique DIY Arduino powered textile flex sensor, created as part of the ... this concept could be taken much further, perhaps using multiple digits for more intricate control.