LCD Problem

hello everyone. i have 1 arduino uno, 4 relay 12v, 4 button, 1 lcd 20*4.arduino and relay working with 1 adaptor. (12v 5 ampere). these are working program and system.
when i use next wall pulag lcd writing deleting. why ? i was use 1 dc capacitor 100 uf for input lcd pins. later i was use “Voltage Dependent Resistor" 275 v for input adaptor. the problem continues. pls help me

This might just be me, but with the limited information you provided I have no clue what help you need.

  • What are you trying to do, and in what way
  • What are the problems and how do you use your power supply

You really need to give us more info if you want help Hasan.

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile: