I bought a 16x2 LCD panel and I'm trying to figure out if this is user error or a defective panel.
It lights up, but when I twist the pentiometer knob, nothing happens on the screen. I have tried it with a second potentiometer that I had lying around, no effect. When I run the adafruit IP clock python script, I get a single row of blank squares that "blinks" every couple seconds, so it's getting data of some kind but it's not actually displaying it.
I saw some previous threads with similar problems and they were soldering issues. I don't think that it is a soldering issue in this case because I tested all of the connections from the LCD board to the Pi Cobbler with a multimeter.
Did I screw up the soldering/wiring or is this a bad board? Photos of my setup/the problem are here: http://imgur.com/a/BE06L
Do I have a defective LCD panel?
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- adafruit_support_rick
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Re: Do I have a defective LCD panel?
I think you have the wiring reversed. From what I can see, it doesn't match the wiring diagram in the tutorial - I think you're counting pins from the wrong direction:
The pin all the way to the left on the diagram is Pin 1. Pin numbers increment to the right, up to Pin 16.
The pin all the way to the left on the diagram is Pin 1. Pin numbers increment to the right, up to Pin 16.
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Re: Do I have a defective LCD panel?
Ha, that was exactly it. Thanks for the sanity check!
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