MOD-USB-RS232 - Open Source Hardware Board
USB to TTL RS232 USB TTL to RS485 Mutual Convert 6 in 1 Convert Module CP2102 | eBay
USB to RS232 DB9 Serial Adapter Cable - Serial Cards & Adapters | Mexico
FTDI USB-to-Single Port Serial Adapter (USB1PFTDI) - Astro-Physics
UC232A1 | Aten USB to RS232 Serial Adapter 1m | Distrelec Export Shop
Keyspan RS232 to USB-A Adapter, DB9, 3-ft Cable | Tripp Lite
PL2303TA USB TTL to RS232 Converter Serial Cable module for win XP/7/8/8.1 VISTA | eBay
USB to Serial Adapter Cable
DIY USB to RS232 adapter - Do It Easy With ScienceProg
6pin FTDI FT232RL USB to Serial Adapter Module USB to TTL RS232 Replacement for Arduino Cable - Walmart.com
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable Black NS-PU99501 - Best Buy
USB-RS232-PCBA FTDI - Module: USB | RS232; USB A | TME - Electronic components
MM232R - Ftdi - USB Interface, Industrial, Home Projects
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
Sabrent USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter 1 ft Cable (CB-RS232) | CB-RS232
CH340G RS232 Upgrade to USB TTL Auto Converter Adapter – diymore
USB-C to Serial Adapter, RS232
Pololu - Parallax USB-to-Serial (RS-232) Adapter #28030
USB To RS232 Converter
USB To RS232 TTL CH340G Converter Module 5v 3.3v Serial Port Module PL2303 UK | eBay
USB to RS232 Converter - 6ft - CAB-11304 - SparkFun Electronics
Interface USB RS232/RS422/RS485 | TOP-electronics
