Main components

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Part NumberDescription
74HCT32
74HC244
74HC688
74HC04Hex Inverter
74HC27
74HC153
74HC193
74HC377
74HCT08
74HCT125
74HCT74
74HC00quad 2-input NAND gate
74HCT04
74HC32
74HC08
74HC157
74HC74Dual D Flip-flop, Set & Reset

B2 schematic

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B2 board layout

B2 PCB render

Top PCB
Bottom PCB