did you figure out if it was writing to the arduino properly?

Didn't do anything, I'm starting to wonder if either certain pins on the arduino aren't working, or maybe the Opto Iso got damaged somehow.

I've tried both 270 and 220 ohm resistors

It seems like information is at least making it to the gameboy, as it gets annoyed when I switch sync modes.

Try swapping the points on the brown pin 4 wire and the 270 resistor in line with the 6n138

Thanks a lot

I'm running it off of USB power, because I don't have a DMG 7, just a DMG 4 cable without the 5V pin.

I've messed with the max patch and it says the arduino is disconnected

Here's two views of the breadboard, It's really sloppy
http://i43.tinypic.com/2h66mnr.jpg

http://i43.tinypic.com/21kvyad.jpg

In the first picture there are two red wires with one end detached from the board, that's a my temporary momentary switch until I get one.

I'm fairly certain I've gotten all the parts on the board properly, if a little difficult to follow.

The lights light up fine, but only when changing modes, and when it boots up.

I'm going to check to be sure I uploaded the program properly

You should just have the one light on when it is connected to the gameboy. Are you running it off the +V line on the gameboy link? I would check your connections to the midi socket and that you have the proper wires connected for the link cable. My drawing is 3D for both those components and what you see is what you would see of you were holding it in front of your face. Made more sense to me like that. So check to make sure you're wired up correctly there. Also, we may be able to help a little more if you have some pictures

I believe I was in mGB mode, but I also tried every other mode. The lights would only flash when I changed modes (not flash, but light up in sequence)

Also- should the lights light up when just the gameboy is plugged in?

The lights should flash when a note is played on whichever channel. Are you in the right mode?

I need some help troubleshooting midi in- what should the lights be doing if I just plug a regular midi keyboard into it and play a few notes?

Glad it helped you guys out

This is what I used to build mine, very simple and good instructions.

Thanks, that helped a great deal

posted this a while back on my blog:
http://2playermusic.tumblr.com/post/703 … arduinoboy
it has a easier to follow diagram, at least for me

edit: all of these issues resolved, still troubleshooting

drop me a mail: ralph(dot)nex(at)gmail(dot)com and we can talk about it

hi nex, yes i would be interested, can you pm me the details or post back on the thread, thanks.

also im located in the Uk if that makes a differnce.

Thanks alot.