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USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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StarTech.com USB to Serial RS232 Adapter Cable w/ COM Retention-USB Adapter - ICUSB2321X - Serial Cables - CDW.com
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USB Type C to DB-9 Adapter Cable - 1.5m long : ID 5446 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
StarTech.com USB to Serial Adapter - 2 Port - COM Port Retention - FTDI - USB to RS232 Adapter Cable - USB to Serial Converter | OfficeSupply.com
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