Twin UART 1 RC2014 Twin 16C550 UART PCB 2 16C550 1 74HCT00 1 74HCT138 1 74HCT393 1 40x2 RA header 2 PLCC44 Socket 2 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 5 10m resistor 3 100nf Single UART 1 RC2014 Twin 16C550 UART PCB 1 16C550 1 74HCT00 1 74HCT138 1 74HCT393 1 40 pin header 1 PLCC44 Socket 2 14 pin narrow DIL socket 1 16 pin narrow DIL socket 2 8 pin header 1 2 pin header 1 6 pin RA header 2 jumper 3 1k resistor 3 10m resistor 3 100nf