ocr: MidiBox 2412 Meridian, Common C Street dents MS39301 Computers 141 +5V 14 +5V Data - Computer 8 To MIDI Out1 5- 220 12 18450413 7 LS04 71 7400 Data From 220 10 5+ OLSO4 111 / Computer 3 MIDI Out2 180 +5V 1K 4 1N914 Ground From Toa add a third (or more) Midi Out, just 2K2 Computer, 4 duplicate one ofthe sections above ysing a spare gate ofthe LS04... also use another 1800 resistor for the +5 feedto Pin 4TO2K7 each 2 added Midic connector(S).. R1* U3 270 2 8 (NC) 3 6 Data Computer to 6 (1)r U280 5 Midi In 4 1N914 3 5 5 Mini-DIN Connector Pinouts for 6N136 (New Macs) Pinouts.. +12V Convertfor old ...