2019-05-02 (Th) Electronic Wind Chimes EWC

Three days worth of trouble and debugging prompted me to shut up and follow the directions for once. Two MIDI isolator circuits were constructed, one for each input, just like the online schematics. All circuitry was placed on a brand new board where it would have plenty of space. All incoming and outgoing wires came to screw terminals so it could be moved and removed if there were any problems. A Sharpie labeled all the screw terminals according to the sketch in the pictures.
Schematic and top view of MIDI input module
Bottom view
Rear view

The new board would be installed under the potentiometers but not mounted to anything. Wires from the MIDI-in ports were removed from the junction board and routed behind the screen.
Wires rerouted behind screen

Everything fit nicely into the screw terminals. There were two power wires, the black and red pair, a signal wire, blue, and the MIDI ports which were each a pair of black and white wires.
Module connected up

For the first time, readings from the commercial MIDI adapter and the Arduino aligned perfectly. The command to turn a note on at channel one is 0x90 and off is 0x80. To make things easier, the incoming signal was note 60, middle C, repeating. There was some other data, mostly zeroes, but this will be ignored by the program looking for notes to come on and go off.
Notes and MIDI readings align

Reading MIDI signals was supposed to take half of a day, maybe the whole day. It took four days. While I learned some tricks and the reason for MIDI hardware choices, it was a punishing few days. This port had better be worth it.

The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6

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