LCD Display Question
I am going to purchase an LCD screen to experiment with here in the next few days. I am a college athlete and money is really tight, unfortunately. I have to spend my money wisely. Nothing against Parallax or their prices. I wanted to get something about 4x20 (at LEAST 2x20). Ease-of-use is not important. Wondering if the 4x20 LCD ($39.99) is reasonably priced. Should I just shop around for a 44780 and another LCD? Can i find something cheaper? Any comments would be appreciated. Thanks,
Blaine
Blaine
Comments
Here is a source (link below) of reasonably priced, surplus LCD's. Make sure you check the supplied data sheet before you make a purchase to ensure that it's HD44780 compatible. Here it the link:
http://www.allelectronics.com/cgi-bin/category/365/LCDs_(Liquid_Crystal_Displays).html
Regards,
Bruce Bates
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You can save some money if you use a HD44780 display, but note this requires about 8 I/O lines and is more difficult to program - see Bruce's link.
Another option is a build-it-yourself serial version like Peter Anderson's #117 kit with a 20 x 4 LCD and parts for the serial controller (minus the printed circuit board) for $19.95 here www.phanderson.com/lcd106/lcd107.html
or a non-backlit version with a printed circuit board for $21 here
www.wulfden.org/k107/index.shtml
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·· What is wrong with the 4X40 Displays?· They are essentially the same as any other display with the exception that they have two enable lines to cover all 4 lines.· Most have lines 1 and 3 on the first controller and lines 2 and 4 on the second controller.· Other than that it’s all the same.
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Chris Savage
Parallax Tech Support
Blaine
I ordered my first few to try out from Feturlec, I don't know why the price is so different but then I don't know much of anything about LCD's.... (yet)
Good prices on SSR's too.
http://www.futurlec.com/LCDDisp.shtml
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Think outside the BOX!
Just felt that for a beginer the 4x40 would be difficult to get to work. Quess I'm just a beginer to because I have been having
a heck of a time getting one to work, bought 2 from Allelectronics for $8.00 apiece. Tried to use two serial control chips to make it work, also tried one control chip and some other logic chip to reroute the enable line. Still no go.
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·· I’ve had pretty good luck with the ones I have used in both parallel and serial mode.· In serial mode I too had to make a custom controller which had dual Enable control lines, but it wasn’t too bad.· Were you able to get anything from the display?· Even treating it as a single unit (2x20)?
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Chris Savage
Parallax Tech Support
http://www.epemag.wimborne.co.uk/resources.htm
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Think outside the BOX!