This converter can be used on any Micro controller - PIC, Atmel or other which has TTL serial communications that needs to be converted to RS232. The 3 pin jumper selects power from the PC or an external power source.

Complete includes:
- One RS232 to UART module

Dimensions:
32 mm x 50 mm

Links:
Manual - http://www.sigma-shop.com/manuals/max232_manual.pdf
Support forum - http://www.sigma-shop.com/board/

NOTE: When you want to use the MAX232 board you have to connect the RX to the TX of the device, and the TX of the MAX232 board to the RX of the device. The only way to make the MAX232 board works, the lines between the device (microcontroller) and the MAX232 board must be crossed.