Arduino Compatible (example sketches available)
MIDI IN and MIDI OUT (5 Pin DIN)
5V or 3.3V operation
Optically Isolated MIDI I/O (4 Pin Header)
This is a kit and requires soldering

Product Description

The MIDI Breakout board is an easy way to connect a hardware MIDI device to an Arduino?? microcontroller?? or embedded computer. The kit comes with a choice of a 4-pin male or female header which provides an optically isolated MIDI I/O signal and power. There are mounting also holes in the PCB for a more permanent installation. An example Arduino sketch is available which will get you up and running quickly.

http://www.amazon.com/gp/product/B00YDLVLVO