and i saw rectangles for a moment , but they disappeared

Load a do-nothing sketch. That way the sketch isn’t affecting your hardware tests.

 

yeah i get values from 0 to 1023

Do you have a multimeter you can read this voltage with?

and i saw rectangles for a moment , but they disappeared

That sounds like one of the connections to the breadboard is not making a good secure connection - a fairly common problem.

 

Do you have a multimeter you can read this voltage with?


That sounds like one of the connections to the breadboard is not making a good secure connection - a fairly common problem.

how do i fix the connection? I think i wired it good

 

Load a do-nothing sketch. That way the sketch isn’t affecting your hardware tests.

I tried but still nothing

 

how do i fix the connection? I think i wired it good

Do you have a multimeter that can read voltages?

 

Do you have a multimeter that can read voltages?

No, i only have a Potentiometer

 

I had a problem with a button once, it was hooked up correctly but it didnt work, the i tried putting the wire on the button and it worked, something was wrong in the breadboard , so maybe something similar is going on

 

No, i only have a Potentiometer

Do you have an LED and a resistor, around 1K?

 

Do you have an LED and a resistor, around 1K?

yes,what should i do?

 

I see the rectangles now, but they are kinda yellow, and I only see them in row 1

 

I see the rectangles now, but they are kinda yellow, and I only see them in row 1

Do they change as you adjust the contrast pot?

 

Do they change as you adjust the contrast pot?

yes

 

yes

I'll rephrase the question: Describe the changes when you adjust the contrast pot?

 

I'll rephrase the question: Describe the changes when you adjust the contrast pot?

rectangles dont exist on 1 side an on the other they are super visable

 

I see the rectangles now, but they are kinda yellow, and I only see them in row 1

That is good. That is what you want.
Next, adjust the contrast pot so that you can make the rectangles fade and then dark again.
For code testing, you want the rectangles to appear between nothing and just visible.

 

That is good. That is what you want.
Next, adjust the contrast pot so that you can make the rectangles fade and then dark again.
For code testing, you want the rectangles to appear between nothing and just visible.

i dont understand

 

i dont understand

Adjust the pot so the rectangles are just visible.

 

Adjust the pot so the rectangles are just visible.

ok i did it

 

Now while testing the code make sure that you continue to see those boxes.
If the LCD setup code works correctly you should then get two rows of boxes.

 

Now while testing the code make sure that you continue to see those boxes.
If the LCD setup code works correctly you should then get two rows of boxes.

Thanks, Now i get text but instead of hello world, I get worldhello`vп&_F
_F b _fxello worl