pls help me with my brightness

k0b · Post by **k0b** » March 22nd, 2007, 12:16 pm

sorry about my english....

I bought LCD 4x20 TC2004A-01 and its work fine on LPT1
but i cant change brightness

i have lcd smatie 5.4, DLPortIO.

its look like all is set in 50% - Brigtness and contrast.

pls help me guys.
thx

Post by **limbo** » March 22nd, 2007, 3:38 pm

I'm not sure that the brightness is supported on these LCDs

k0b · Post by **k0b** » March 22nd, 2007, 7:28 pm

so anyone know how to change this ?
pleas give me some tip

Post by **limbo** » March 22nd, 2007, 8:51 pm

On parallel connection the module have a potentiometer for this function (contrast). This applies to LCDs.
It should be there on VFD as well.

Post by **mattcro** » March 22nd, 2007, 9:06 pm

Is this the LCD? http://www.tinsharp.com/en/products.php ... class[0]=7 (first item on page).

Did you get an LCD and wire it yourself, or was it a pre-assembled product with connector etc ready to plug in (like this: http://www.watercoolingshop.com/catalog ... cts_id=348 )

I don't think Smartie can control the backlight brightness in software. It can turn the light on or off if you use the circuit on the Smartie schematics page, but the ready-made kits I've seen don't include this.

If it's a ready-made one, it's probably fixed at maximum brightness (and the contrast may be preset too). You have to fiddle about modifying it to change brightness. You can add a potentiometer to manually vary the brightness a bit - this is also shown on the Smartie schematics page at http://lcdsmartie.sourceforge.net/circuits.htm

k0b · Post by **k0b** » March 23rd, 2007, 12:50 am

ok, am understand.

thx so much, i will stay with that what I have now.. ;] dont whant to thouch beafore will be worth

that was this second link, u got right, my lcs its ready-make up with cables and everythink, now am set up lcd to good position and view is ok.

thx so much.