Text only | Text with Images

Dangerous Prototypes

Other projects => Past projects => USB serial LCD backpack => Topic started by: gege2b on October 25, 2012, 06:26:34 pm

Title: Nokia LCD Backpack
Post by: gege2b on October 25, 2012, 06:26:34 pm
Hi all

I build my fresh new nokia LCD backpack some days earlier, and it doesn't work >_<
After some measurments, the 3.3v out of the linear regulator is about 0.6v ! (while the +5v from USB is good)
I've changed the regulator, same problem

I've checked if there were some bridges or other things like that, but nothing noticeable... Did you have an idea from where I should look ?

regards

gege
Title: Re: Nokia LCD Backpack
Post by: tayken on October 25, 2012, 06:31:43 pm
Does the regulator get hot? Did you check if the 3.3V line is shorted to GND? Those are the first things to look for IMO. There can be a trace problem or one of the caps can be bad. Lots of factors.
Title: Re: Nokia LCD Backpack
Post by: gege2b on October 25, 2012, 09:32:58 pm
Thank for your response

the regulator doesn't get hot to the touch, and the output isn't shorted as far as I tested
anyway, I'll take another look, more carefully, i've certainly missed something
Text only | Text with Images

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.00912057248session_write_close ( )...(null):0
20.00942188840ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.00942189616Database_MySQL->query( ).../DatabaseHandler.php:119
40.05482328352Database_MySQL->error( ).../Db-mysql.class.php:273