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Author Topic: [solved] Salvaged LCD  (Read 1782 times)
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Hello,

I've never used an LCD before, however I found one today on a pile of electronics I was cleaning up.

It's a 14 pin LCD with no markings so I can't find much help online...

Is there anyway you know of testing this?

Thanks
« Last Edit: February 08, 2011, 09:20:01 am by Aqlor » Logged

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How about a photograph of the back?

Don
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There you have it



I didn't thought it would be helpful though
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Raw LCDs are tricky to drive.  Have a look at this http://arduino.cc/forum/index.php/topic,51464.0.html

as a quick experiment try running a 50hz square wave at 3v across the two end pins and see what you get.
« Last Edit: February 07, 2011, 08:49:57 pm by bill2009 » Logged

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Quote
I didn't thought it would be helpful though
At first I thought you were correct, but in that view it looks like the four pins on the right could go to a controller, and the next four may not be connected to anything.  This is consistent with the data pin connections using a 4-bit data interface to an HD44780 controller.  Try following the left pin and see if it goes to ground and see if the third pin from the left goes to the potentiometer.

Don
« Last Edit: February 07, 2011, 09:16:45 pm by floresta » Logged

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To be honest... from the look of it... it's quite unlikely that is a dot matrix HD44780 driven display.  You should proceed as if it was just a normal, plain glass LCD.
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If nothing else, you've got a lot of nice other parts on that board.
The LCD501 silkscreen is not much help in google.
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Looks like the broken coffee maker I took apart. Only kept a few screws as the display is a bare panel like this one. I wouldn't try it, waste of time.
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Take a look at this thread, maybe this will  help
http://arduino.cc/forum/index.php/topic,51464.0.html
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Thank you so much smiley
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