Honestly it's worth the few extra bucks for a Teensy 3.2 and run the latest Arduinoboy on it, which supports USB MIDI out of the box. $19ish
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Actually for USB MIDI and output to gameboy only, without any additional hardware, a Teensy LC should work as well. If you want input you'll need to drop the gameboy's gb->arduinoboy data line to 3.3v. Teensy LC will probably fry at 5v input.
You can get a Teensy LC around ~$11.50
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Michigan
trash80 wrote:
Actually for USB MIDI and output to gameboy only, without any additional hardware, a Teensy LC should work as well. If you want input you'll need to drop the gameboy's gb->arduinoboy data line to 3.3v. Teensy LC will probably fry at 5v input.
You can get a Teensy LC around ~$11.50
Right, the inputs are not 5v tolerant on an LC but the are very cost effective considering that they have native usb-midi. Plus with all of those analog inputs, you could have some real CC-fun.
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Los Angeles
Plus the latest Aboy on Github supports Teensy. 
Bit off topic: There is another aboy version in the works that supports USB<->Many MIDI serials relaying as well as as many gameboys as there are free pins. Just need to figure out how I want to implement the configuration setup. (Either sysex or just simple code editing at the top)
https://github.com/trash80/Arduinoboy/b … Arduinoboy
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trash80 wrote:
Plus the latest Aboy on Github supports Teensy.
Bit off topic: There is another aboy version in the works that supports USB<->Many MIDI serials relaying as well as as many gameboys as there are free pins. Just need to figure out how I want to implement the configuration setup. (Either sysex or just simple code editing at the top)
https://github.com/trash80/Arduinoboy/b … Arduinoboy
SYSEX! SYSEX! SYSEX!
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Los Angeles
herr_prof wrote:
trash80 wrote:Plus the latest Aboy on Github supports Teensy.
Bit off topic: There is another aboy version in the works that supports USB<->Many MIDI serials relaying as well as as many gameboys as there are free pins. Just need to figure out how I want to implement the configuration setup. (Either sysex or just simple code editing at the top)
https://github.com/trash80/Arduinoboy/b … ArduinoboySYSEX! SYSEX! SYSEX!
Sigh, it's super easy to flash a Teensy. IT HAS USB FOR THE LOVE OF...
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Fine! DIdnt know youd keep a usb jack on it, or have custom hardware without the programmer. Would it also have usb midi?