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MIDI Drum Machine Main Page Features Photos Schematic CPU Section Analog Input All Inputs Power Supply MIDI Port Front Panel Circuit Board Layout Firmware MIDI Protocol Details

Midi Port Schematic

This is the circuit suggested by the MIDI specification.

• Main CPU Section Schematic
• Simplified Analog Input Schematic
• Complete Analog Input Schematic
• Power Supply Schematic
• Front Panel Schematic
• Wiring Schematic - not on-line yet

  Note: the new board will change the PC-900 to a 6N139, which is less expensive and more readily available.