The Crystal board is my attempt to make a Field Programmable Gate Array (FPGA) board that is affordable AND useful - for students and hackers alike. Having been a professor for an FPGA class, this is a project born out of frustration at the non-existent options for students who want to continue tinkering with FPGAs, even after the semester ends. Not to mention hackers, makers, and scientists. The Crystal Feather prioritizes: Affordability, approachability, and usefulness. Based on a the Lattice CrossLink-NX, in an fully compliant Adafruit Feather formfactor. Which means: - 17k LUTs at a sub $50 dollar price point - Usable with 90 different Adafruit Feather Wings - 3x Analog inputs(!), 4x LEDs, 6x Buttons, 1x PMOD, LiPo Charger - No BGAs! Graciously brought to you by PCBWay and my own frustration with the status quo.