LCD display text is very dim

Projects General Guidance
21

  • You can try solid core wires, make sure Arduino +5v goes the display Vdd.

  • You would need a voltmeter to measure the voltage :frowning:

  • Assume you don’t have a 2nd display ?

  • The display soldering looks good from this vantage point.

2 Likes
22

Youre a life saver!!! Switching the red and black wires for new wires worked! Thanks a ton!

23

And it is better to not power LCD via +5V. It is better to do it using a power splitter as below image:

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image1899×1039 174 KB

1 Like
24

I admit I always used I2C displays (so I have never had to do with the contrast pot) IMO there's no reason to do that. A pot with both wires to GND won't change anything to the V0 pin, so what's the deal doing it?

Anyway I read this:

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image619×384 66.7 KB

I won't keep this "debate" alive more than that, but I'm just curious and I'd like to understand your point.