MIDI over DIN – in/out circuit

In Dart controllers, the MIDI_over_USB communication is always active, this allows the controllers to be used very often with the computer, but in many cases it may be necessary to have the classic MIDI over DIN connections.

Enabling MIDI communication through the classic 5-pin DIN connectors requires the assembly of a special circuit, described below.


 MIDI IN / OUT circuit on breadboard MIDI IN / OUT circuit on DART_MOBO

MIDI over DIN – required components:

  • 1x 6N138 optocoupler IC
  • 2x 1N4148 diode
  • 2x 22o ohm resistors
  • 1x 10k resistor
  • 1x 470 ohm resistor
  • 2x DIN – 5poles female panel connetors


MIDI over DIN – Expansion kit