This is simplified version of regular FatBreak without option to choose upper or lower contact.
It is used to connect typical Fatar diode matrix keyboard to DMS-2K
dual diode matrix scanner, or MIDI128 standalone 2-keyboard organ MIDI controller
To connect one keyboard you need one set as shown in the picture above.
This board does not help in velocity sensing, it is only to simplify connection to DMS-2K scanner board, which is not velocity-sensitive.
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