Re: [lcd4linux] backlight Control

[nef17 <ne...@gm...>]

HI thx for your answer.
My LCD runs under WinXP with jaLCD really good. backlight is on. 
But if i use lcd4linux i can make screens but the backlight can't be turned 
on. My lcd is connected like this : http://www.jalcds.de/
images/4x20backlight.gif

Display HD44780
Port 0x378
Size 20x4
#Delay 503
Bits 8
Wire.RW AUTOFD
Wire.RS INIT

MY QUESTION:
How can i turn my Backlight On???

Thx a lot

Stefan


Am Sonntag, 28. Dezember 2003 09:38 schrieb Thomas Siedentopf:
> Hi Stefan,
>
> ne...@gm... schrieb:
> | Hi can anyone tell me how to turn my backlight on with using lcd4linux??
> |
> | I have got Suse 9.0 and a HD447.. Display I get Screens on the Display
> | but the Backlight is off??
>
> This is a hardware issue and has nothing to do with the software.
>
> The backlight is a simple lamp which can be connected over a little
> resistor to +5V. On most HD44780 display modules this can be achieved by
> connecting Pin 16 to GROUND and PIN 15 to the slider of a 100 ohm
> potentiometer. The other end (does not matter which of both Pins) of the
> resistor goes to +5V, the third end stays unconnected.
>
> After this you should have the backlight which can be changed in its
> intensity by adjusting the slider of the potentiometer.
>
> But:
> Please make sure that you have a *real* HD44780 compatible module first. If
> not you may destroy your module because I am refering to real HD44780
> compatible Pinouts only.
>
> If the above method dos not work then it might be possible that your
> backlight lamp has become defective.
>
> | Please help me Thx a lot
> |
> |
> |
> | Stefan
>
> CU,
> Thomas.