Provides 3 buttons for the hotkeys:
-- raise hand/lower hand
-- mute/unmute audio
-- show/hide in-meeting chat panel

Two main buttons support student's use case: raise hand → unmute audio → answer the question → mute audio, lower hand.

As an extra feature, third button shows/hides in-meeting chat to avoid annoyance which happens because of chat allerts.

Platform: Digispark ATtiny 85.

Hotkey preset: Zoom for Apple computers, customized version (see below).
Windows, Linux, etc. could be configured without any problems, and all have been tested.

More info on Github: https://github.com/olgapavlova/zoomboard