IIRC correctly you only need the supply voltage and contrast voltage to see the square blocks on line 1.
So long as you aren’t driving the contrast with PWM (Melanie’s old trick), you should see the blocks with the chip unpopulated.
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Re: LCD do display - but pins check out
IIRC correctly you only need the supply voltage and contrast voltage to see the square blocks on line 1.
So long as you aren’t driving the contrast with PWM (Melanie’s old trick), you should see the blocks with the chip unpopulated.
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