Pages: [1]   Go Down
Author Topic: Multiple MIDI THRUs (Bypassing Arduino)  (Read 1163 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Karma: 0
Posts: 9
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I'm trying to have multiple MIDI THRUs split off from a MIDI IN data signal (at the same point where the MIDI data goes into the rx pin). Unfortunately, I have some boards etched already and I'm not getting the expected result from the following circuit:

The idea for this came from:

via: RuggedCircuits in
"Arduino sending MIDI to two devices at the same time?",63681.0.html

Is there a way to slightly modify my circuit to get the job done? Hopefully I can still use the IRLIB9343. I have subsequently found that most MIDI THRU circuits recommend a method involving 7404 HEX INVERTERS and a 5V+ on MIDI pin 4.

What's up with all the grounding on the method I originally chose to go with? Why no 5V+? 

I think I have a fundamental lack of knowledge on the subject. Is MIDI protocol inverted binary compared to what an Arduino rx pin expects? Can i route the MIDI IN data from before the opto isolator into my iRLIB9343 THRU setup to avoid using an inverter?

Pages: [1]   Go Up
Jump to: