CH340G -USB to TTL UART Module Board Serial Converter For Arduino Nano Raspberry Pi : Buy Online Electronic Components Shop, Price in India : electroncomponents.com
CP2104 USB to Serial Converter Arduino Programmer from Makerfabs on Tindie
Arduino as a usb to serial(TTL) converter - YouTube
Arduino USB to 5V Serial Converter – Electronix Express
Yizhet 2PCS USB to TTL Serial Converter with 5 PIN Jumper Wire Cable Chip Compatible with CP2102 Arduino, Windows 7, 8, 10, Linux, Mac OS X: Amazon.co.uk: Computers & Accessories
Using a Pololu Programmer v2 as USB to Serial for communicating with an Arduino Uno R3 - Other Pololu products - Pololu Forum