6N137 on MIDI8 and MIDI-IO Boards

[Antichambre]

It's about 6N137 optocoupler as replacemant for 6N138 on MIDI8 and MIDI-IO Boards.

Differences is that the 6N137 is a CMOS level output.

More than that the 6N137 will allow you to significantly increase the speed between two MIDIbox.
From datasheet maximum speed is 10 MBaud/s instead of 100KBaud/s for the 138.

On the MIDI board you just have to remove the 4K7 resistor and replace 1K pull-up for a 10K. Done!

Best regards
Bruno
 

[Phatline]

thanks for that!

[Hawkeye]

yup, good info! very nice!