This featherwing is an HID keyboard via the USB interface of Feather of choice, that uses mechanical switches in the layout of old professional braille transcribing machines.
It is useful for transcribing books from roman alphabet to braille alphabet, which is the first step needed to publish a book that can be read by a visual impaired audience via tactile means.
The software for the braille-HID translation, is ready and using CircuitPython so it can be easily changed and adjusted for example for changing the pinout for a different CircuitPython enabled Feather, without the need for and IDE or external software, by just having a text editor to change the files.
This hardware replaces obsolete and hard to repair or new but ridiculously expensive, with hacker level hardware that can be built, modified and repaired by anyone with very little training, and it is a solution needed in multiple countries to translate current books and newspapers to Braille.
After ordering the Featherwing PCB from a PCB service or making yourself one with a CNC, double check that you have the correct amount of parts by ordering them or by recycling them from another mechanical keyboard.
To assemble, there is only one way to plug both types of parts used in this project, neither the Feather or the keyboard switch can be plugged in the wrong order so if you are new to soldering, this project is perfect for you. All of the soldering pads have a nice large size so it can be worked with any type of soldering station.
Plug the mechanical switches without any particular order into the board and solder it's two pads to the PCB.
Solder female headers on the side of the Feather board.
You can decide if you would want the headers to go looking up on the same side of the keys so the Feather will be on top, but can also be attached to the bottom of the featherwing by connecting the headers in the opposite side of the keys.