USB to RS232 UART Serial Converter PCB USB-RS232-PCB
FTDI USB TO RS232 module PCBA DB9 pin industrial PC interface conversion | eBay
Amazon.com: FTDI USB-RS232-PCBA Module, USB to UART Serial Converter PCB, FT232RQ : Electronics
PL2303 USB rs232 converter adpater serial module port Prolific pl2303 rs232 pcb board adapter
Buy Wholesale China Usb To Rs232 Serial Adapter Pcb W/ Embedded Electronics, Usb Connector And Leds & Usb To Rs232 Serial Interface Pcb For Cable at USD 7 | Global Sources
FTDI - USB-RS232-PCBA - IC DEVELOPMENT MODULE USB-RS232 5V USB-A PLUG PCB, USBmadeEZ-UART Series - RS