Each new circuit I build, I seem to make every possible mistake, including inverting 5V and ground. I did that precise mistake on this 2x16 Sainsmart LCD. The backlight definitely works, but is the only thing I seem to be able to make work. Do you believe I fried the screen, or do they maybe have a diode to protect from erroneous cabling, and my mistake is another one?
I found this somewhere, on a board that might be the one driving this LCD screen or not :
Operating Voltage VDD -0.3 to +7.0 V Driver Supply Voltage VLCD VDD - 10 to VDD + 0.3
So I mistakenly put 5V in VLCD, and 0V in VDD, which makes VLCD 5V and not 0.3V above VDD, would you suppose I fried it?
Thanks for your input :)