He chose to add storage to his USB mouse but didn’t want to alter the factory look provided by a color-changing LED inside. To make things fit he ended up cutting a good portion of a USB hub’s ...

In 1980, Logitech started selling a round, three-button input device known the Depraz mouse or Swiss mouse ... The firmware is a mix of Microchip’s USB HID demo code and [Daniel Kao]’s ...