[OT] Possible bulk buy on 128 by 64 graphic displays with touch screen

[ian.bird@xxxxxxxxxxxxxx]

Hi all

I am looking at buying some of these (see below) touch screen displays
from Apollo for a project I am working on but the supplier has upped the
minimum order quantity to 1000 pounds plus VAT and delivery. This is a
little more than I wanted to spend so I am looking to share the burden.

The displays are available in either blue/white mode or amber/dark blue
mode. They have a 4 wire resistive touch screen pre bonded onto them. You
can see the non touchscreen version in action at the beginning of the last
UKHA video. You can get a taster of the work I will do from this page
although there are no details of the touch controller chip on there.

http://www.mollyology.com/ProjectsGraphicDisplayInterface.php

I am thinking it would be best to sell these on with the touch controller
and other hardware fitted onto a small daughter board otherwise
interfacing would be problematic for most. I would bring out the
connectors to standard headers unless anyone wanted something different.
The PCB's would be professionally produced - not home made.

Here is the link to the suppliers page about the screens

http://www.apollodisplays.co.uk/51553.php

This would mean anyone could get into really neat touch screens for their
home made devices at relatively low cost.

I also have some C code to talk to these units using the parallel
interface as well as a library of functions for circles, ovals, lines,
rectangles, text, custom characters and pictures which I will share. The
code is written for the AVR CodeVision C compiler but should be pretty
portable. I ported some of it from another compiler in the first place
anyway.

The touch screen outputs the touch coordinates with a T prefix followed by
two 4 digit comma separated sets of coordinates. A release action sends
the same string but the prefix is an R e.g. T0123,0232 or R0212,0232.
Coordinates are sent across a serial link at 9,600 or 19,200 as long as
the screen is being pressed. This enables dragging to be supported if you
are really keen.

If anyone is interested please mail me at ian at mollyology dot com or on
list if applicable.

I would expect the screen, associated electronics and PCB completely
assembled and tested to be about 50 to 60 quid. I am not making any money
out of this, just breaking even. I simply cannot afford the have 1200
quids worth of screens sitting on the bench for the next year or two until
I complete my current rather complex project.

I am not knocking the LCD shop or other sources of screens but I do
believe these prices compare very favourably with lesser screens e.g. the
20 by 4 line display Keith mentioned earlier at 20 pounds in single
quantities. They are simpler to interface but have no touch screen option
and are far less versatile.

As always, feedback and suggestions welcome.

Thanks

Ian

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