Analogue-sequencer

Looks to me from the datasheet like that part is much the same as the ones I
use.
The backlight LEDs need a drive current rather than a voltage, but that is
achieved by putting a series resistor in the supply.
You may need to calculate the right resistor value for the LEDs used.
The parts I supply need 30mA, and have a voltage drop of about 3.5v, so I
use a 47 ohm resistor.
The datasheet for your part gives a typical current of 40mA through the LEDs
at 3.5v drop, so you may want to use a slightly smaller resistor.

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

 

> -----Original Message-----
> From: analogue-sequencer@yahoogroups.com 
> [mailto:analogue-sequencer@yahoogroups.com] On Behalf Of bambam4236
> Sent: 07 November 2008 01:05
> To: analogue-sequencer@yahoogroups.com
> Subject: [analogue-sequencer] Re: Specs for replacement LCD 
> needed urgently...Can't find anything definite.
> 
> I managed to find a blue display (better then what i found yesterday)
> locally that seemed to fit the bill, it is a winstar WH1602A-TMI-JT 
> 
> Once i got it i realised it has a negative voltage generator onboard?
> I asked the guy i bought them off about it and he replied :
> 
> "3V Power Supply means as the LCD generates Negative Voltage, it can
> also run in 3V power supply.
> 
> You can use the 5.0V power supply follow the spec sheet as well. The
> only difference is to connect the backlight, instead of using pin 15
> and 16, u have to connect A&K Pin to get the backlight as Pin 15 and
> 16 will perform as a negative voltage generator.
> 
> All the others connections will remain the same."
> 
> I'm a little confused here and was hoping someone might help, can i
> wire this the same as the standard display colin supplied? Can i do
> any damage to the P3 by using one of these?
> 
> I have boring old green lcd's that will be fine but would love to use
> this blue one tonight if i can.
> 
> thanks
> Brett
> 
> 
> --- In analogue-sequencer@yahoogroups.com, "bambam4236" <bamsyn@...>
> wrote:
> >
> > Thanks heaps colin, i managed to find one locally in time for the
> > weekend ;)
> > 
> > --- In analogue-sequencer@yahoogroups.com, "Colin Fraser" <colin@>
> > wrote:
> > >
> > > As far as 16x2 displays go, there are only three or four 
> variations
> > on the
> > > mounting point layout that I have seen, and anything non-HD44780
> > compatible
> > > is rare.
> > > The LCD display I supply for the P3 is an EA W162B-NLW
> > > Datasheet for the whole EA range is here:
> > > http://www.electronic-assembly.de/deu/pdf/doma/blueline-w.pdf
> > > You'll see they do a couple of different 16x2 form factors.
> > > 
> > > Best regards,
> > > Colin Fraser
> > > Sequentix Music Systems Ltd
> > > http://www.sequentix.com
> > > 
> > > 
> > > 
> > > > -----Original Message-----
> > > > From: analogue-sequencer@yahoogroups.com 
> > > > [mailto:analogue-sequencer@yahoogroups.com] On Behalf 
> Of bambam4236
> > > > Sent: 05 November 2008 01:03
> > > > To: analogue-sequencer@yahoogroups.com
> > > > Subject: [analogue-sequencer] Specs for replacement LCD 
> > > > needed urgently...Can't find anything definite.
> > > > 
> > > > Sorry if this has been spec'd before....i'm sure it has.
> > > > 
> > > > I've been searching previous messages and am having 
> trouble finding
> > > > actual specs of the replacement LCD people are using. I 
> need my P3
> > > > ready to go this saturday! so need to find a LCD locally.
> > > > 
> > > > I have the adapter board etc supplied by colin.
> > > > 
> > > > I assume the lcd is a HD44780 type? and i know its 16x2 but can
> > > > someone give me a datasheet etc so i can make sure i get one
> that fits
> > > > physically and electronically?
> > > > 
> > > > Thanks
> > > > Brett
> > > > 
> > > > 
> > > > ------------------------------------
> > > > 
> > > > Yahoo! Groups Links
> > > > 
> > > > 
> > > >
> > >
> >
> 
> 
> 
> ------------------------------------
> 
> Yahoo! Groups Links
> 
> 
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