Analogue-sequencer

Hi Colin

thanks for the info ;) I got the following HD44780 based backlit 
display from futurlec a while back 
http://www.futurlec.com.au/LED/LCD16X2BL.jsp
I've conpared the spec sheets and the pinouts are the same as are 
the voltage requirements (if anything this model looks a bit more 
tolerant)
The DDRAM addressing looks completely differnt to me but i was 
hoping someone could take a look at the link above and tell me if 
theres anyway i can use it before i go and buy from crystalfonts and 
pay more for shipping then for the module!

thanks
Brett

--- In analogue-sequencer@yahoogroups.com, "Colin Fraser" 
<colin@...> wrote:
>
>  
> > 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
>