This is the perfect place to keep your cat, your coffee cup, or in [Jacek]’s case, your fantastic DIY trackball ... to the computer. To send the click events, [Jacek] baked some mouse buttons ...

These days most mice will work on either Mac or PC, so you’ve got access to just about the entire PC mouse market, from wired to wireless, trackpads to trackballs, and even over-the-top ...

On the opposite side, you've got standard A B X Y buttons arranged in the familiar layout with a number pad below. Physical ...