For sure it's tricky! And when using such a small arduino as Nano it gets hard to squeeze everything to their own places.

I think I found a one problem though. When I start a track in FL studio, it seems like arduinoboy resets first and then starts to play the song. Otherwise I have been really happy about it.

Glad to hear you got it working! It can always be tricky your first go at it

Last night my arduinoboy stopped to receive data from MIDI in port. I replaced opto isolator and diode, but even after that nothing happens.

Maybe I just have to rebuild everything again...

E: After checking Trash80's schematic I think I found where the problem lies. I forgot to connect one pin from the isolator! I feels so stupid right now.

E2: It works!

I checked my wiring and resoldered few wires, but still no success.
HOWEVER, when I press play or stop, DMG makes really faint squeaking sound. And when I add C5 I get (again, faint) knocking sound. No matter which mode I am using these sounds appear.

o_o

I followed 2PLAYER's guide with DMG-07's cable. I'll recheck my wiring when I get back to home!

If you didn't catch the edit, double check your wiring on the link cable. I spent days on the first one I built just because I got the pin numbers confused

Make sure you aren't trying to play midi notes that are outside of MGB's range. Test with a C5 or something.

I don't imagine your diode is to blame. To my knowledge those two diodes are basically equivalent.

Whoa, that was quick answer!

And yah, DMG is fine, I have tested arduinoboy with two different DMGs, no difference.

And I think I'm using right channel (arduinoboy supports channels 1-4 right?) and I have tried all possible modes.

This is my first thing with MIDI, so I might be missing something obvious.

Have you tried any troubleshooting beyond your soldering? Is your DMG solid (sound/link port working)? Are you sending midi notes on the correct channel and within usable range? Is your arduinoboy set to the MGB setting?

If the lights are blinking in response to midi information it seems possible that your Arduinoboy isn't the problem. Good luck!

edit: double check your wiring on the link cable as well. those can be tricky.

Hi there!
Yesterday I built my first arduinoboy! It looks nice and stuff, but I can't get it to work. I've been trying to send notes through FL studio's MIDI out but all I get is arduinoboy's LEDs blinking, but DMG with mGB is silent. I have checked my solderings but I don't find any shorts or similar. Can someone please help me with this one?

As a side note, I used 1N918 diode instead of 1N914. Could that be the reason why it isn't working properly?