Basic breakout board for FTDI's popular USB to UART IC. Now with internal oscillator and EEPROM, the FT232RL is an impressive IC!
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V.
RS-232 to RS-485 - sometimes you need the flexibility that a RS-485 gives you over the simple RS232!
The RS-485 wiring standard & protocol is very well established for industrial applications, and the Devantech USB-RS485 lets you bridge this easily to your PC's USB port!
Using the FT232RL, the Arduino Serial USB Board shows up as a com port allowing serial communication to and from the Arduino Stamp or any other serial device.
Designed to replace RS232 serial cables. A Bluetooth Class 1 device with up to 100m range (free space). Easy to setup and configure using LM Technologies LM049 user interface.