Neotech NT7086 display and arduino? Answered
I found a couple of these older looking dot matrix LCDs in some electronic logbooks that didnt work. it was a 14 pin connector, so i figured why not try it out. i found the pinout of each pin using the chips that were on board, but i don`t know where to go from here, or if i should even bother.
the display was made by or for hantronix, and they have a touch layer that could be used as well. each display has 7 of the NT7086PQ chips on it, a 74HC74D, a 74HC40103D, and an LM324. it was originally connected via a flat flex cable, but it had a convenient place for headers to plug it into a breadboard.
the 74HC40103D is an 8-bit synchronous binary down counter: http://www.nxp.com/documents/data_sheet/74HC40103.pdf
the 74HC74D is a Dual D-type flip-flop: http://www.mouser.com/ds/2/302/74HC_HCT74-225071.pdf
the Neotech chips are LCD display drivers: http://www.crystalfontz.com/controllers/NT7086.pdf
upon inspecting the physical properties of the display I can see there are the rubber/carbon edge contacts on two sides and a ribbon on one end. The pinout i figured out is:
14 is GND
13 is base on SOT23 transistor (connected to 12 on parent board)
12 collector on a SOT23 transistor
11 gets pulled low at some point (pulled low on parent board)
10 is power
9 is cl2 (unactive high?) (on one set of neotech chips, assuming the edge contact drivers)
8 Clock input (74HC40103D)
7 does nothing
6 is d4 on one chip?
5 is display off (active low)
4 is d4
3 is d3
2 is d2
1 is d1
So i would appreciate any input people have. I would ideally like to drive this using an arduino/atmega, and although i have not read the neotech datasheet to much depth it would appear to work similar to the popular parallel displays, but maybe with different syntaxes.
so is this a possible thing, or is it a fruitless endeavor?
thanks in advance.