LCDInfo.com

http://www.lcdinfo.com
It is currently Fri Mar 29, 2024 10:47

All times are UTC + 2 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: RANDOME CONTRAST
PostPosted: Thu Apr 13, 2006 16:19 
Offline

Joined: Thu Apr 13, 2006 16:16
Posts: 2
hello all,
i bought a NOKIA LCD from sparkfun with an EPSON controller and when i connected it to my MCU i found that its contrast is changing randomly and automatically !!! plz if anyone knows how to fix this then i need his/her HELP plz, by the way i tested the code in sparkfun and it did the same .... thx in advance ... Bye


Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 14, 2006 14:01 
Offline

Joined: Sun May 02, 2004 4:28
Posts: 19
Location: Brazil
Hi,

There are a special note in Sparkfun site:

Special Note:
We noticed that the latest shipment of LCD screens are more sensitive to noise on the power supply. The booster circuit introduces some noise that causes the display to flicker, changing brightness randomly. To suppress this noise so that the display does not flicker, the included 100uF capacitor can be soldered between GND and Vdsp of Header 2. (watch polarity on the cap!). If you are not using the booster circuit, the cap might not be needed. This cap will be included on futrure versions of this board, we just wanted to get these out now!

Bye

_________________
---=[ Junior ]=---
www.lcdmania.net


Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 14, 2006 17:26 
Offline

Joined: Thu Apr 13, 2006 16:16
Posts: 2
hello .... i dont know what is the booster circuit is coz iam not using it ?!!! then i added this capacitor and nothing changed :(


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC + 2 hours


Who is online

Users browsing this forum: No registered users and 25 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group