This MIDI board is designed for 3V3 UART logic. The shrouded header is designed for use with the LTC board (link here....). However, when a standard pin-header (angled) is used, then there are the following connections:
Orange Pi Zero / One GPIO header
The AutoCad Eagle source files including the Gerbers are available here -> https://github.com/vanvught/h3dmx512-zip/tree/master/eagle/Orange-Pi-Zero.
BOM
Qty Value Device Package Parts
1 10K Resistor 0204/5 R6
5 220 Resistor 0204/5 R1, R2, R3, R4, R5
3 470 Resistor 0204/5 R7, R8, R9
1 5V LED LED3MM LED1
1 RX LED LED3MM LED2
1 TX LED LED3MM LED3
1 1N914 Diode D-5 D1
1 MIDI-IN DIN5 DIN5-RA-PTH J3
1 MIDI-OUT DIN5 DIN5-RA-PTH J2
1 MIDI-THRU DIN5 DIN5-RA-PTH J1
1 OPi Connector 2X3-SHROUDED J4
2 100nF Capacitor C050-024X044 C1, C2
1 74HCT04 74HCT04N DIL14 IC1
1 6N137 6N137 DIL08 OPTO