MIDI Channel Mapper
The MIDI Channel Mapper allows you to map any input MIDI channel to any output MIDI channel with a user-friendly interface. Multiple input channels can map to the same output channel, and there are preset modes for directing all input channels to a single output channel and disabling all output.
Bill of Materials
| Qty | Part | Label |
|---|---|---|
| 1 | SPST Switch | PWR_SW |
| 1 | DPST Switch | MIDI_DISABLE_SW |
| 1 | 4.7kohm Resistor | R1 |
| 4 | 220ohm Resistor | R2, R3, R4, R5 |
| 1 | 1N914 Diode | D1 |
| 1 | 6N138 Opto-isolator | U1 |
| 1 | PJ-002A Barrel Jack Power Connector | DC1 |
| 1 | HD16K33 7-Segment Display and Backpack | DISP |
| 2 | 10kohm Potentiometer (ALPS RK203) | POT_IN, POT_OUT |
| 1 | SPST Pushbutton | SAVE_BTN |
| 2 | SDS-50J Female MIDI Connector | MIDI_IN, MIDI_OUT |
| 1 | Arduino Nano (or clone) | NANO_1, NANO_2 |
Aruino Library Dependencies
- MIDI.h
- Wire.h
- Adafruit_GFX.h
- Adafruit_LEDBackpack.h
