Arduino Forum

Using Arduino => Displays => Topic started by: Lasivian on Jan 31, 2011, 09:47 am

Title: Trying to get a 4x40 LCD working
Post by: Lasivian on Jan 31, 2011, 09:47 am
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 :)
Title: Re: Trying to get a 4x40 LCD working
Post by: mowcius on Jan 31, 2011, 11:10 am
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
Title: Re: Trying to get a 4x40 LCD working
Post by: Staedtler on Jan 31, 2011, 11:12 am
^^^^ Right, the link doesn't work.

Try this thread, (http://arduino.cc/forum/index.php/topic,50428.0.html) if the information on the datasheet is the same just try that configuration.
Title: Re: Trying to get a 4x40 LCD working
Post by: mowcius on Jan 31, 2011, 11:22 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
Title: Re: Trying to get a 4x40 LCD working
Post by: Staedtler on Feb 01, 2011, 01:05 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 (http://tinyurl.com/4ezpmvm) connecting a Shift Register... but I don't know if he has that one.





Title: Re: Trying to get a 4x40 LCD working
Post by: jrraines on Feb 01, 2011, 01:09 am
http://code.google.com/p/liquidcrystal440/
will work if it uses 2 hd44780 (or clone) chips
Title: Re: Trying to get a 4x40 LCD working
Post by: Staedtler on Feb 01, 2011, 01:11 am

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.