yoyz2k wrote:Ho, sorry,
I mean, I have a two midi plug :
- One plug is a midi in ;
- One plug is a midi to DMG port ;
Daily I use a gba sp, and I think I could easily build a "midi to gba sp cable".
I don't know the pin which are used from the cable.
Could you help me on this side.
One last thing, I think you have made one of the best arduinoboy i've see.
Thanks a lot 
Neat! Glad to hear you're into making your own electronics too.
I'll explain how to go about this and if you need more details I can send you photos or maybe some video.
You'll NEED a multimeter to do this!
FIRST
Take the cable I gave you and place both ends facing you. It'd be great if you had some helpy hands to hold it. Set your multimeter to the continuity check setting. This is the setting that beeps when both test leads are touching the same electrical path.
Place the first test lead (either hand) to the top right hand tooth of the DMG cable. With the other test lead move it between the points of the the MIDI Cable. When you hear a beep, that means that DMG tooth corresponds to that part of the MIDI cable. WRITE IT DOWN!
Do this for every tooth of the gameboy cable until all pins of the MIDI Jack are accounted for.
Note: The bottom center tooth of the DMG cable will have no connection. Also, when I say 'bottom' I mean the fatter side of the cable and 'top' relates to the side that is pinched a little bit
SECOND
I highly recommend buying a new male MIDI plug for this part rather than trying to modify the cable I gave you.
Take your GBA Link cable and cut it in half. You'll want to strip the series of wires in there so your multimeter will be able to make contact with them. Now, do the same thing as Part 1 except this time, you'll be taking note of the colored wires inside the GBA cable rather than MIDI Pins.
THIRD
Take the information you know from both experiments to find out which wire of your GBA cable should go to which pin of the MIDI plug.
This is a treacherous part as you'll constantly be trying to discern front from back of the MIDI plug.
TAKE YOUR TIME. Take good notes on colors and you won't have a problem at all.
When you're completely finish. CHECK YOUR WORK. Compare it to the cable I sold you and make sure that all the teeth correspond to the same MIDI pins.
For example, if the bottom left tooth of my DMG cable correspond to the middle pin of the MIDI plug, then yours should as well!
Hope this all makes sense to you?
BTW Hit me up on email for a faster response - [email protected]. I check the forums every few days.
