The Lynx Cart Programmer Pi-Hat is an add-on board for a Raspberry Pi 2 (and later) that lets you read and write your own Atari Lynx cartridges.
This was an early pre-production model that had a total of 7 boards made. The production board had a number of changes including a black PCB and the LEDs were changed to green (activity) and red (error). See details of the production board here - Lynx Cart Programmer Pi-Hat.
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There were earlier prototypes of the board produced too. The very first prototype featured an orange cart connector that made use of pogo pins to make contact with the cartridge.
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An even earlier attempt at the board was simply meant to be an adapter for the Lynx Cartridge and Kari Kaksonen's programmer board.
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