Lcd Not Working..

[koossa]

This one is supposed to work?
Controller/Driver: KS0070B

[DynamoBen]

If the LCD is wired improperly it can permantly damage the lcd. (hence no boxes)

[koossa]

I have done the following

DEFINE LCD_COMMANDUS 4000
define LCD_DATAUS 555

As well as replaced the LCD with a new one, but still nothing?

[DynamoBen]

You will need to find out what makes the two units different. Compare datasheets. This difference could be the problem.

[Ingvar]

As far as i know, KS0070B and HD44780 are compatible. You need to check the pinning of the displays, they may be different. You also need to make sure that the display is ready to recieve data before you use LCDOUT, some displays are really slow. Give it a couple of seconds.

/Ingvar

[koossa]

I have bought myself a 100k potentiometer and connect it to the LCD's Vo Pin, but does not get any response from the display?

A strange thing, I don't know if this is supposed to do it, I'm a bit new in electronics.

On the LCD's VDD Pin I get 5v when I remove the LCD, but when the LCD is connected I only get +-1.2volt, is this normal?

[Dwayne]

That is a high voltage drop....
ARe you SURE your LCD is a low current LCD??? There are LCD's out there that take 300 mils to run! I happen to have 2 of them...And they will blow a unsinked 7805 in a extremely short time... and will blow a 7805L in a even quicker time.

How about your LCD's display contrast? is it adjusted correctly? usually a 10K pot with center going to your contrast pin and ends going to +- is all that is needed....Adjust pot until black squares show up. Some LCD's do not need this pot...Some do.

Dwayne

[NavMicroSystems]

...On the LCD's VDD Pin I get 5v when I remove the LCD, but when the LCD is connected I only get +-1.2volt, is this normal?

I guess your LCD is DEAD