DaveKennett Posted September 24, 2008 Report Share Posted September 24, 2008 Dave’s Miditzer 216 PART 1When I first downloaded the 216, I was so taken that I knew I had to have a console for it. We had a 1960s vintage Conn 642 two manual with 25 pedals, but I was somewhat tired of the sound. Could that be the midi source for the Miditzer? Could I keep the Conn operable and still do the midi interface? After a couple weeks surfing the net, I decided to proceed. It then took about two months to complete after ordering the first supplies. But there were some bumps in the road. Special thanks to all those on the forums for smoothing out the bumps. I hope that by telling my story, I can make the path easier for others.Some internet research led to several hardware options that seemed feasible. I decided to order two CORE modules and six digital input (DIN) modules, along with some rainbow ribbon cable and connectors from SmashTV (http://www.avishowtech.com). They were shipped on July 25th. SmashTV was quick and accurate, but here’s what I did wrong.2 CORE module kits w/PIC18F452, one Sysex ID 00, and one Sysex ID 01No problem here!6 DIN module kitsI was planning to use the keying voltage from the Conn to apply a + voltage to the DIN board when a key was pressed. The board is wired with pullUP resistors, so that a key grounds the input when pressed. I had to modify the board for pullDOWN resistors. The schematic for this board at http://www.ucapps.de showed that a jumper could configure it either way, but that is not the case with the SmashTV boards. On the plus side, they use Dual In Line headers which mate nicely with easy to use crimp type IDC connectors. If anyone is interested. I could post the details for the modifications separately.3 1/4" PotentiometersUsed one for single expression pedal, broke one, and have a spare.4 PCB mount MIDI jackDidn’t need them; they are included in the CORE kits.4 2 pin SIL connectorUsed two for power hookup between COREs.3 5 pin SIL connectorDid not use.2 IDC connector 16 pinUsed one for connection of CORE to display (for troubleshooting)1 (meter)16 conductor ribbon cableUsed about a foot for display (soldered to display)35 IDC connectors 10 pinTrashed a couple - ran out - had to order more. Order at least six more than needed.6 (meter)10 conductor ribbon cable WAAAY less than needed. I ended up using about 80 FEET.I also ordered a 00DM2004A-B-B6NTW 4-line display from 411 Technology Systems in San Marcos, CA.(Used only for initial programming and troubleshooting) It served its purpose, and now sits in the box of leftovers from my project.That should be about enough for now. Next, I’ll talk about construction and programming the CORE modules.Dave Quote Link to comment Share on other sites More sharing options...
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