Amazon.com: HiLetgo FT232RL FTDI Mini USB to TTL Serial Converter Adapter Module 3.3V 5.5V FT232R Breakout FT232RL USB to Serial Mini USB to TTL Adapter Board for Arduino : Electronics
CH340 USB to TTL Converter UART Module CH340G (3.3 V/5.5 V) | Elektor
Industrial USB TO TTL Converter, Original FT232RL Onboard, Multi Protection Circuits, Multi Systems Support
Quantum Instruments Wireless TTL Adapter for Hasselblad 862652
Multi USB-RS232-RS485-TTL Converter - DFRobot
USB to 3.3V/5V Serial UART TTL Auto Sensing Adapter
20pcs 3.3V 5V USB to TTL Converter CH340G UART Serial Adapter Module STC
UW Technics TTL Converter for Sony with Marelux Housing
Amazon.com: DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming : Electronics
DFRobot RS232 to TTL Adapter - RobotShop
CH340G CH340 USB TTL Serial Adapter UART FTDI Router Upgrade ESP8266 Arduino | eBay
USB to 3.3v TTL PIN Header Cable with FTDI CHIPSET
USB To RS232 TTL Converter Adapter
Amazon.com: USB to TTL Adapter, USB to Serial Converter for Development Projects - Featuring Genuine FTDI USB UART IC 'FT232RL' : Electronics
Usb to Serial/TTL Adapter : 5 Steps - Instructables
Black Box RS-232<->TTL Converter - serial adapter - RS-232 - IC1157A - Serial Adapters - CDW.com