Having the contrast wired wrong is the reason you see the black squares.
Having the contrast going to 5+ is wrong. Sometimes going to (-) will work but the best bet is to use a pot like the manual and Al said. Then it is adjustable.
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Having the contrast wired wrong is the reason you see the black squares.
Having the contrast going to 5+ is wrong. Sometimes going to (-) will work but the best bet is to use a pot like the manual and Al said. Then it is adjustable.
Dave
Always wear safety glasses while programming.
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I have just put a pot there, and now I either get black squares or nothing
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Hi,
For a quick contrast setting ... just use the forward voltage of a Si diode ( .5 to .6 v @ 1 mA ) to set Vo ... ( do not work with OLED displays !!! )
simple and efficient ...
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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