Our reconstruction of the card10 consists of two boards: The Fundamental Board and the Harmonic Board. They serve different purposes and travelers interact mostly with the Harmonic Board.
The Harmonic Board sits on top of the Fundamental Board. It contains most of the user interface and a few sensors.
A PDF version of the schematic of the Harmonic Board is available [here](https://git.card10.badge.events.ccc.de/card10/hardware/blob/master/boards/Harmonic-Board/Harmonic-Board.pdf)
