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Author Topic: Trying to get a 4x40 LCD working  (Read 2131 times)
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lasivian
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« on: January 31, 2011, 03:47:23 am »
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I have a 4x40 LCD and i'm not sure if anyone has gotten one of these working before.

This is the datasheet: http://www.lasivian.com/files/pc4004a.pdf (Corrected link)

EDIT: On further digging that is not the correct datasheet, and I cannot find the proper one. It is a "Data vision P73-1" 4x40. It has 4 chips silkscreened with "SEC C929 KS0063B" and 2 with "SEC C923 KS0066U-00".

Any info is appreciated, thanks smiley
« Last Edit: February 02, 2011, 03:35:44 am by lasivian » Logged

mowcius
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« Reply #1 on: January 31, 2011, 05:10:16 am »
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That datasheet link doesn't seem to work.

I have driven an HD44780 compatible 40x4 display before. Just requires 2 enable lines - the liquidcrystal440 library can cope with it (possible the IDE bundled liquidcrystal library now - not sure).

Mowcius
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Staedtler
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« Reply #2 on: January 31, 2011, 05:12:55 am »
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^^^^ Right, the link doesn't work.

Try this thread, if the information on the datasheet is the same just try that configuration.
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mowcius
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« Reply #3 on: January 31, 2011, 05:22:32 am »
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That was for a 20x4 which is similar (as it uses 2 HD44780 chips) but different as it will have a different pinout.

Anyway, can we get a working datasheet link? Then we can work tell you exactly how to hook it up.

Mowcius
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Staedtler
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« Reply #4 on: January 31, 2011, 07:05:30 pm »
 Bigger Bigger Smaller Smaller Reset Reset
Quote from: mowcius on January 31, 2011, 05:22:32 am
That was for a 20x4 which is similar (as it uses 2 HD44780 chips) but different as it will have a different pinout.

Anyway, can we get a working datasheet link? Then we can work tell you exactly how to hook it up.

Mowcius

Gotcha!

Actually I was working with 74HC595N's today, and here is this schematic for the 40x4 connecting a Shift Register... but I don't know if he has that one.
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jrraines
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« Reply #5 on: January 31, 2011, 07:09:08 pm »
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http://code.google.com/p/liquidcrystal440/
will work if it uses 2 hd44780 (or clone) chips
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Staedtler
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« Reply #6 on: January 31, 2011, 07:11:51 pm »
 Bigger Bigger Smaller Smaller Reset Reset
Quote from: jrraines on January 31, 2011, 07:09:08 pm
http://code.google.com/p/liquidcrystal440/
will work if it uses 2 hd44780 (or clone) chips

I totally forgot the liquidcrystal440! is a great library.
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Eight bytes walk into a bar. The bartender asks, 'Can I get you anything?'
- 'Yeah', reply the bytes. 'Make us a double'.

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