A fully programmable USB LED keypad powered by an Arduino Pro Micro, a TLC5940 LED driver, Cherry MX Black switches and X-keys relegendable keycaps. Everything is connected on a custom designed PCB and enclosed in a 3D printed case. Hotkeys can be changed from any webUSB enabled browser (Chrome and Edge by now) from https://keypad.sasso0101.dev/.
I use it to control media (volume, play/pause, skip/rewind) and to switch the dangerous mute/unmute button on different platforms such as Google Meet, Discord and Zoom (I'm sure everyone needs this in Covid-19 times 😄), but can emulate any combination of keys. Each key can also be used to send predefined data through the serial port.
