Noise in the circuit causing LCD issues

[johnerrington]

@orangewill

mean well AC to DC power supply

Can you post a SIMPLE schematic showing how the power supplies are provided and how it is all grounded?

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

HAve you tried using a meter between the arduino ground and the panel to see if it is really isolated or grounded together or if there is a voltage between them?