The result is a compact instrument with software that can be modified using the Arduino ... capacitive sensors to control note frequency and volume, this design relies on two optical sensors ...

The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close ... by side as in the case ...

It should come as no surprise your optical mouse contains ... is a 15×15 pixel grayscale image sensor. [Franci] started this project by bringing out the Arduino and Ethernet shield.