2021-12-27 (M) EWC_Panel MIDI port experiment

I assumed my hypothesis about MIDI ports was nothing new.

I had three ports in my drum machine, one for incoming signals, one for outgoing data that includes my drum machine notes, and a solo port. Typical MIDI-enabled devices have a "Thru" option, but that doesn't include data generated on the instrument. I referred to my port as "Solo."

The drum machine had four serial ports, so it was no problem to use a second, but I don't have extra lines in the rest of my instruments. I wanted to substitute a digital output for the Vcc commonly used but split the outgoing data. The standard output port would be wired in the usual way. I could write the output low while retransmitting, and my solo port would output nonsense (it would be inverted and unrecognizable as coherent MIDI). If the next MIDI receiver included an optoisolator, it would filter out the nonsense anyhow.

I wired my inexpensive Arduino Nano clone with an input isolator and a couple of output ports. I marked the wires of the "Solo" port and connected my power pin to the first digital output. I'll have to test my hypothesis later.
Experimental MIDI ports

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
Completed projects from year 7
Completed projects from year 8

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