27 Apr '13, 9pm

MIDI out for a Korg CX-3 organ

MIDI out for a Korg CX-3 organ

[Michael] loves this old organ of his, but recently he wondered if it would be possible to add MIDI out without altering its original functionality . With a bit of research and more than a bit of hard work he accomplished his goal. The nice thing about working on a quality piece of hardware like this is the resources you can find regarding how they work (which we bet is tailored for how to repair them when they break). [Michael] found a website with plenty of info on the circuit boards and how they work. From this he was able to locate a few chips which stream serial data regarding which keys have been pressed. Bingo! Once he located the three signals he was after he built a board to translate them to the MIDI protocol. His circuit is based around an ATtiny2313. It is supported by a liner voltage regulator circuit as well as a buffer chip which converts the incoming signal...

Full article: http://hackaday.com/2013/04/27/midi-out-for-a-korg-cx-3-o...

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