How_to_use_arduino_as_ttl If you doesn't have TTL (Transistor-Transistor Logic) USB and want to do Rx-Tx transmission. Don't worry you can use us arduino.

There are ways to use Arduino as TTL converter. For instance, you can remove Atmel chip from your board (if it's not soldered) or connect RST to GND. However none of that has worked for me to connect ...

In this short video we will show how to use an Arduino development board as a USB to TTL Converter (also known as COM or RS-232) converter.

Microduino: An Arduino clone nearly as small as a quarter, for $20 Arduino Uno capabilities divided into two small boards for extreme portability.