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'[EE]Where can I find an 8 line by 16 character Hit'
2005\06\15@163036 by Wallace Yang

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Dear all,

Where can I find an 8 line by 16 character Hitachi
44780 based LCD?  It would be preferable but not vital
if it had a low power-consuming backlight LED.

Thanks.

Wallace Yang
U of T
Electrical Engineer, new grad

2005\06\15@170227 by Jason Harper

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Wallace Yang wrote:
> Where can I find an 8 line by 16 character Hitachi
> 44780 based LCD?

I do not believe that any such thing exists.  The 44780 only supports
two lines of text; character displays with four lines either use two
44780s, or treat the bottom two lines as the right sides of the top two
lines.  Either way, the LCD columns have to be split in the middle, so
that the top and bottom halves of the display can be driven separately.
To do an 8-line display, the columns would have to be split into four
pieces, and it would be extremely difficult to make external connections
to the two middle pieces.

To get your 16x8 text display, you'd probably have to use a graphics LCD
module - 96x64 pixels would be sufficient if you used a 5x7 font with
one pixel spacing between characters.
       Jason Harper

2005\06\15@171456 by Spehro Pefhany

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At 04:30 PM 6/15/2005 -0400, you wrote:
>Dear all,
>
>Where can I find an 8 line by 16 character Hitachi
>44780 based LCD?  It would be preferable but not vital
>if it had a low power-consuming backlight LED.

I've never seen one with more than 4 lines, but of course that doesn't
prove anything.

The HD44780 has only 80 bytes of RAM, which limits the number of characters
(even when used with the HD44100 external expander chip).

So, such a display would have to have two HD44780s and two enable lines.

You could also use a graphic LCD module.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spam_OUTspeffTakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff


2005\06\15@174535 by Peter Onion

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On Wed, 2005-06-15 at 16:00 -0500, Mike Hord wrote:

> If you ABSOLUTELY MUST HAVE 8 lines, 16 characters
> per, you may need to look into using a graphical LCD
> instead, and just drawing text.

Like this ....

http://www.btinternet.com/~Peter.Onion/PhaseData/p002148.jpg

You'll see three font sizes on there.  Smallest gives 18x8 characters.
Middle size is 12x4 and largest is 4x2 (only digits in the font though)

>   I've never done it, but I
> gather it's not too difficult.  In fact, I've heard some people
> say that once they got over the hurdle of starting with a
> graphical LCD, they use them for EVERYTHING, even
> apps which only need text.

Yup, once you have a library written it's really easy.

Peter



2005\06\15@201404 by Denny Esterline

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I don't believe such a critter exists, but this might be an alternative:
<cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26206&item=752335761
5&rd=1&ssPageName=WDVW> (watch for link wrap)

It's an 8 line by 24 character text only lcd driven by an on board 8051
variant with a serial interface. I bought a couple from him a while ago for
a project that was canceled.

-Denny

So long, and thanks for all the fish.

{Quote hidden}

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