No problem! Let me know if you have other questions.

Thanks @catskull
Those links are a huge help, just what I was looking for,
If I can't get it working I'll hit u up about your kits. (although I'm sure I will have no problems now  

1. The schematic Trash80 made is confusing. I recommend looking at this video since the schematic for IN is the same but it explains it better.
http://www.notesandvolts.com/2015/02/mi … input.html
http://www.notesandvolts.com/2015/03/mi … utput.html

2. Leave pins 1 and 4 floating. In Trash80's schematic 7 is floating as well, but nitro2k01 recommends connecting 7 to ground through a 4.7k resistor.
http://blog.gg8.se/wordpress/2009/07/26 … -glitches/

3. Leave all the extra midi pins floating. If you want to ground them you probably could but it's unnecessary.

Shameless plug: I'm selling kits here for pretty cheap that include a PCB so it's easier to hook everything up. If you're interested hit me up.

Thanks @knife crimes

Can anyone answer the other questions for me?.

Looking at the 6N138 datasheet, pins 1 and 4 are NC, not connected to anything, so can be left unconnected. Pin 7 is connected to the base of the 6N138's output transistor and should be left open. If you ground pin 7, the Arduinoboy won't work.

Hey I was hoping some one here could clarify a few  things for me regarding arduinoboy schematic on Github
https://github.com/trash80/arduinoboy

1. Am I looking at the front or back of the 5 din midi jack on the schematic?

2. Do pins 1, 4, and 7 on the 6N138 need to be connected to ground or can they just be left floating?

3. Do the pins that are not connected from the 5 din midi jack also need to be grounded or can they be left floating?