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Nick Kruft
04-18-2007, 05:52 AM
i have an lcd display very similar to your non-backlight 16x2 char. model. only problem is that it doesnt have the module on the back with the switches, contrast, and controller chip. is there any way to use this without the backpacked controller? chips on back of the display·are labled (left to right)·
..........................................R
.....5M5 1.................5L2
..HD44100H............HD44780A46

dots are for formatting only and arent on the chips

thank you,
nick

Forrest
04-18-2007, 08:01 AM
What you have is typically called a Parallel LCD and you use it with a Stamp, but it requires (7) connections to your Stamp. Here's Parallax's Parallel LCD Manual showing you the connections along with some sample programs www.parallax.com/dl/docs/prod/audiovis/lcd2x16par.pdf (http://www.parallax.com/dl/docs/prod/audiovis/lcd2x16par.pdf)

Pat Alonzi
04-18-2007, 08:50 AM
There are also a variety of Serial LCD controller chips you can use so that the PARALLEL lcd can be converted over to a 1 pin SERIAL lcd

all electronics has an LCD ic that would work for you.

-Pat

RDL2004
04-18-2007, 09:32 AM
There are several places to get a "backpack" board or chip that will turn your parallel LCD into a serial one that's easy to use with Stamps.

Wulfden's kit (http://www.wulfden.org/k107/order.shtml) - I have used this one and it works well. This is actually a PHAnderson (http://stores.ebay.com/PHAnderson-Electronics_Serial-LCD_W0QQcolZ2QQdirZQ2d1QQfsubZ8QQftidZ2QQtZkm) kit I think.


Sparkfun (http://www.sparkfun.com/commerce/product_info.php?products_id=258) - I have one of their serial LCDs that uses this, but haven't had a chance to try it out yet.

EDE chip at All Electronics (http://www.allelectronics.com/cgi-bin/item/EDE-702/285/LCD_CONTROLLER_IC_.html) - This is a pre-programmed PIC. Its the chip only, so it will not be as easy to use. You also need need a 4MHz resonator to go with it.


EDIT - I probably should add... If you or someone you know can program SX chips (you need an SX-Key or Blitz), there's an example in the SX-Key help file that will do what you want.

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- Rick

Post Edited (RDL2004) : 4/18/2007 1:55:55 AM GMT