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mob-if-midi

MIDI Module Board

MIDI IN/OUT/THRU module board. This MOB can operate at both 3V3 and 5V.

mob-built

Schematic

mob-schematic

PCB Layout

mob-pcb

Bill of Materials

  • paperboard 5x7cm

  • 2-pin (Molex-KK) 5V-GND power connector

  • 3-pin (Molex-KK) 5V-3.3V-GND power connector

  • 2 x bulk capacitor (tantalum) 10uF

  • 2 x led current limiter resistor 1Kohm and 680ohm

  • 2 x power activity led green 3mm

  • 3-pin voltage selection header

  • 3-pin (Molex-KK) serial Rx-Tx-GND connector

  • 3 x DIN5 pcb connector

  • 3 x data activity led current limiter resistors 1Kohm

  • 3 x data activity led green 3mm

  • 6 x resistors: 5 x 220ohm, 1 x 680ohm

  • small signal diode 1N4148

  • 2 x decoupling capacitor C=100nF

  • IC optocoupler 6N138 with socket DIP4+4

  • IC Hex Schmitt-Trigger Inverter 74LS14 with socket DIP7+7