Digole
Digital Solutions
iDigole Buyer ProtectioniDigole Buyer
Protection
My shopping cart
0 Items:
Secure Checkout
Top Rated Plus
Visit Our Live Auctions
99.9% Customer's Satisfaction
 
Forum login or
Login:
Password:
  
Forum Catagory
Digole Serial Display (182)
  12864 LCD/OLED module (18)
  24064 LCD module (2)
  Color LCD Modules (14)
  Color OLED module (19)
  DownLoad (1)
  Online Emulater (1)
  Text LCD module (1)
  Universal GLCD module (1)
  Universal Text LCD module (1)
  ~Application Note~ (0)
Digole Smart Display (2)
  DownLoad (1)
Pattern Drive Module (1)
~Buy & Sell on Digole (2)
~Others~ (3)
Forum : Digole Serial Display : 12864 LCD/OLED module :

 Search Forum.. 
 Creat New Topic   Reply 
herby
Total Posts:
3 
Since:
2016-Mar-09 
From:
Australia

colour lcd 5volt line has 5k wave form on it
Posted at:2016-04-13 05:32:08 Edited at:2016-04-13 05:34:28    

Hi,

Running the 2.4" colour lcd, I encountered some noise on the 5 volt line in my system application. Tracked it down to the screen which was pulling the 5 volt power line down by about 200 millivolts at a frequency of 5k.

This caused a problem with the rest of my system which requires a stable voltage. Any ideas how to minimise or stop the screen from pulling down the 5volt power level?

Sorry my screen is actually a 320 x 240 lcd

 
Service
Total Posts:
346 
Since:
2013-Dec-22 
From:
Canada

RE:colour lcd 5volt line has 5k wave form on it
Posted at:2016-04-13 11:10:56     

 It may because of the backlight PWM circuit, put the backlight full on (100%) or try a large bypass cap on Vcc may reduce the this noise
Copyright Digole Digital Solutions, 2008-2019. All rights reserved.
Powered by Victor Sun