user30873: I recently got an Arduino LCD screen. I tried connecting it to the UNO with the 10k potentiometer and all the needed equipment but all I got were white rectangles instead of characters. I have uploaded the hello world code but I saw no changes.


user21253: As @Majenko already mentioned, you have to set the right contrast. Use potentiometer to find out what value suits you right.

30873: <p>I recently got an Arduino LCD screen. I tried connecting it to the UNO with the 10k potentiometer and all the needed equipment but all I got were white rectangles instead of characters. I have uploaded the hello world code but I saw no changes.</p>

<p><a href="https://i.stack.imgur.com/E8sai.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/E8sai.jpg" alt="enter image description here"></a></p>
 21253: <p>As @Majenko already mentioned, you have to set the right contrast. Use potentiometer to find out what value suits you right.</p>
