Keyboard Noise Maker

Ever wanted a clicky keyboard but only had a boring quiet one? The solution is here! This is a dedicated hardware “clicker” that you can associate with any USB keyboard. A daemon running on the host computer listens to events from the keyboard and forwards them to an MCU that does the needed clicking.

Hardware

• Arduino
• Relay module
• Bell(?)

Software

• USB HID listener attached to a single USB keyboard (tested on Linux)
• output of the listener redirected to Arduino’s serial port

Running

Flash the Arduino code, build the host daemon, run it and redirect it to the Arduino’s serial:

cd hid_listen
make
sudo ./hid_listen > /dev/ttyUSB0

TODO

• USB device IDs are hard-coded, should be taken as CLI parameters

Sources

• USB Raw HID