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The PCB design for a smart chess board

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Main components

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Part NumberDescription
TXB0108PW8-Bit Bidirectional Voltage-Level Translator, Auto Direction Sensing and ±15-kV ESD Protection, 1.2 - 3.6V APort, 1.65 - 5.5V BPort, TSSOP-20
ADS1115IDGSUltra-Small, Low-Power, I2C-Compatible, 860-SPS, 16-Bit ADCs With Internal Reference, Oscillator, and Programmable Comparator, VSSOP-10
TXS0104EPWBidirectional level-shifting voltage translator, TSSOP-14
SN74AHCT125QPWRQ1Automotive Catalog Quadruple Bus Buffer Gates With 3-State Outputs

Chess schematic

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Chess board layout