• Convenient for contact or HALL sensor or optoelectonic keyboards
• Can be directly connected to the KI64 (64 inputs boards)
• Direct USB/MIDI or classic MIDI outputs and Input
• Can also drive a real Pipe Organ with power Outputs boards :

• - CIPAR : Optoelectronic Interface

• - O2x64 : power cards with 7A Darlingtons inside. 128 power Darlingtons for outputs

• - O4x64 : power cards with 2803 Darlington arrays, under 150MA or external Darlingtons. (0,01 $ each) 256 power outputs. See soldering example here. Extra Darlington boards are available.
  
  

General wiring scheme :