Closed Goicannafr closed 7 years ago
Sorry for the long gap in replying. The signal that gets output from the "Step" pins (even numbered pins) will essentially be a square wave at the correct frequency for the MIDI note, so you shouldn't need to modify the Arduino code at all.
I don't know for sure the specifics of connecting that signal to the HDD, but it does seem likely that you'd need to use a transistor to really get much sound out of it. You could try it directly from the Arduino, but I guess there's a chance you could damage the Arduino if it tries to draw too much current.
Hello! I'm wondering if it's necessary to modify the code on Moppy to play MIDI on HDD. From what I understand, it's important to amplify the signal with transistors, but I can't figure out how to do it. Any advice or help will be appreciated. Thanks!