LCD IIC/I2C module

Other Hardware General Electronics
1

Hello everone. How to connect LCD(2x16) IIC/I2C to Arduino, with wires, without using any Funduino or others. I used this scheme https://www.instructables.com/id/Make-an-Arduino-FM-Radio-using-TEA5767 . But the LCD is showing black squares. Maybe it`s code problem?

2

Did you try changing the contrast... some units have a little potentiometer on the backpack... like the blue thing in this picture.

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3

wolframore:
Come on... just google it... so many examples out there and all the instructions needed to get it going... this is really basic.. GOOGLE

I tried and i found what i need everything, but i think code is bad. Can you check it?

4

check the contrast first.

5

wolframore:
check the contrast first.

how to do that?

6

saltis:
how to do that?

turn the little knob on the blue thingy on the I2C backpack that's attached the the back of your LCD.

7

I dont have lcd backback

8

Would you mind posting complete information. Post a schematic Model numbers or links to products and code. Please use appropriate tags as listed in how to use section of this forum.

9

saltis:
I don't have LCD backpack

Then you do not have an I2C display module unless it is a completely different one to those generally used here and shown in the project you cite. It indeed, does not use an I2C display module.