OBERHEIM SYNTH

Hi to anyone interested in the Matrix 6 replacement display project.
I have made some progress in the last few days.   I now have a 16x1 line std LCD module
echoing what is on the display of my M6R.   My LCD is not backlit, so the currentdrawn by the LCD plus the PIC is just 2.7 mA.   Once a backlight is added, that will go upa lot, of course.   The display uses 5 connections to the M5R display board:
+5VGndDCLRbDCLKbDDATA
I just have ribbon cable tack soldered onto the pcb for these currently.   Since my 
VFD display is working fine, I did not remove it or try to fit the LCD in its place.
The circuit is just an 18-pin PIC chip, a 10K resistor and a 0.1 uF cap to bypass powerto the PIC.   I am using a solderless breadboard currently, and have not designed any sortof pc bd.

I will probably work on this a little more to clean up the code, but for now that is whereI am.  The code should work with any 16x1 LCD module that uses a 44780-type controller chip.Most of them do.    This is the cheapest kind of LCD.   Most people would probably wanta backlight.  Many of the newer modules have one that can be powered directly from 5V,unlike the older ones that required an external current-setting resistor.  Of course if the backlightdraws 50 mA, then it's up to the M6R supply to provide that extra current.

      Bob
 

      From: "Dave Garfield daveogarf@yahoo.com [oberheim]" <oberheim@yahoogroups.com>
 To: "oberheim@yahoogroups.com" <oberheim@yahoogroups.com> 
 Sent: Friday, November 21, 2014 7:30 PM
 Subject: Re: [oberheim] Re: Matrix-6 display issues?