16C2550 Dual Serial Module BOM 1 RC2014 16C2550 Dual UART PCB 1 16C2550 1 74HCT00 1 74HCT02 1 74HCT138 1 74HCT393 1 40x2 RA header 1 PLCC44 Socket 3 14 pin narrow DIL socket 1 16 pin narrow DIL socket 3 8 pin header 2 2 pin header 2 6 pin RA header 3 jumper 6 1k resistor 4 100nf