Your diagram in post #8 has the contrast pot wrongly wired. Correct the wiring as per the attached snap. Then adjust the pot till you have clean characters on LCD.
Al.
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Your diagram in post #8 has the contrast pot wrongly wired. Correct the wiring as per the attached snap. Then adjust the pot till you have clean characters on LCD.
Al.
All progress began with an idea
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im not using any pot at all. I have just put the Vo to +5volt with resistor between, if thats wrong I wouldnt seen those black squares, right?Originally Posted by aratti
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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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