Analogue-sequencer

> I remeber hearing talk about a backlit display for the P3 and i think 
> it is mentioned in the build docs as there is an extra 
> reistor to add, 
> ive tried hunting the messages for backlit but didnt come up with 
> much...anyone here get one and could you possibly point me in the 
> right direction?

The standard P3 display is a PLED module, where the matrix emits light
itself, so there's no need for a backlight.
The interface for the PLED display is essentially the same as the de facto
standard Hitachi LCD controller interface.
You'll find many different modules from different makers which will use this
same protocol.

One difference I've found across different modules is the connections used
for the backlight.
On the PLED modules I use, the connections are numbered 15, 16, 1, 2, 3, ...
14
Pins 1 to 14 are the standard logic connections for data transfer, pins 15
and 16 are for the backlight.
I've seen LCD modules with this same pin layout, and also some with 1, 2, 3,
... 14, 15, 16 instead - check before you wite it up incorrectly.
Note also that pins 15 and 16 are not wired on the PLED adaptor board
supplied with a P3 kit, so you either need to wire your ribbon cable to your
display module directly, or use a couple of jumper wires from the adaptor
board to the right pins on the LCD module.
You also need to fit an appropriate value for R19.
This can vary depending on the forward voltage of the backlight in the
module you are using.
This should be an LED type backlight by the way - some older displays used
EL backlights, which require a totally different supply.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com