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MMD
Tech
Octet
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designed by Laurent Corey, Portland, OR sold by MIDIator System, San Diego CA data compiled by Robbie Rhodes UM1 Universal MIDI Interface
PD1 perforator controller [image needed here]
UM1 Universal MIDI Interface The UM1 can be configured by the user either (1) to accept switch closure signals from 128 switches and output MIDI data at the standard bit rate to the MIDI wireline output connector, or (2) to accept MIDI wireline data and output switch closure signals to external devices such as organ valves. A related but smaller circuit board (designated UM0, I believe) is employed in the PowerRoll device produced by Larry Broadmoore. Variations offered, and the prices in 1996, were UM1
$249.00
UM1 User's Manual (revision 4-July-1997) [[ yet to be compiled
]]
PD1 perforator controller The PD1 circuit board accepts perforator control data from the host computer and outputs signals to 120 solenoids and the paper drive stepper motor. Synchronization to the perforator is by signals from a photo-interruptor and shutter on the perforator crankshaft. The system was a joint project developed by Laurant Corey and Wayne Stahnke. Laurant designed and produced the circuit board, Wayne provide the "Punch" software program and drivers. The circuit card was offered with driver transistors installed for all output channels (typically for organ use), or with 100 solenoid drivers plus 4 stepper motor driver transistors for use with a perforator. Prices in 1998 were PD1-100 (104 outputs) $479.00
PD1man.html (18 kb) PD1 User manual (8-18-98) (18 kb) (HTML) 1N6267A-D.pdf (66 kb) Motorola
Zener diode family 1.5KExxxA (1N6267A) (PDF file)
PD1_Output_Configuration.gif
(23 kb)
Errata, PD1 Output Configuration drawing: 1. The sketch shows power FET IRFU320 (100v?). The production
board uses a MTP3055VL (60v), case 369-07.
10 July 2001 |
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