If counterclockwise, the DOWN signal is registered at each step. Luckily, using the mouse scroll wheel encoder with an Arduino Uno proved to be easy after I made a slight modification (see below).

Imagine creating a mouse that fits your hand perfectly, providing comfort and precision. You can make this a reality by combining the power of Arduino ... operated scroll wheel for ease of use.

Start with a standard optical mouse with a fairly small footprint. ? Take a photo of the pcb layout to trace the tracks if needed. ? Remove the microswitches and the wheel encoder. ? The ring from ...