Compusync 78 - Programmer and MIDI Clock Converter for Roland CR-78

MIDI Clock to trigger interface for Arduino and the Roland CR-78

MIDI Start/Stop

MIDI Start and also Stop and Continue will generate Start/Stop trigger for the CR-78. That is necessary because the CR-78 does not stop on a falling gate but needs two consecutive triggers to start and stop.

TS-1 WRITE

TS-1 WRITE is supported. The interface listens on channel 10 for incoming MIDI notes. MIDI notes will be quantized to 16ths and will generate a trigger for the TS-1 input. That makes it possible to record paterns to the sequencer in realtime.

Depends on the Arduino MIDI Library and watterott/Arduino-Libs/digitalWriteFast

Demonstration Video on YouTube

BOM

Arduino R3 / ELEGOO UNO R3 Compusync Shield

• R1 220 Ohm (x1)
• R2 10 kOhm (x1)
• D1 1N914 (x1)
• IC 6N138 (x1)
• Male Header 30mm 8 (x2)
• Cables 3.5mm mono to 6.3mm mono jack (x3)
• Screws, nuts and nylon washers for standoff spacers (x8)
• Little rubber feet (x4)

Eco Version

• SparkFun Accessories MIDI Connector - Female Right Angle PRT-09536 (x1)
• SparkFun COM-09190 Momentary Button 12mm (x1)
• Thonkiconn Mono 3.5mm Audio Jacks (PJ398SM) (x3)
• Standoff Spacer M2.5 30mm (x3)
• Powersupply 9V center positiv or USB charger (x1)
• Protective Bumper Case (x1)

Boxed Version

• MIDI Connector with solder lung (x1)
• Arcade style Momentary Button (x1)
• 9V Socket 5.5mm 2.1 (x1)
• PJ301BM Jack Socket with solder lung (x3)
• Hammond Case 1590B (x1)
• Wires to solder jacks, button and MIDI sockets (x12)
• Standoff Spacer M2.5 (x4)
• Powersupply 9V center positiv (x1)