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Hello,
im from germany (sorry for my bad english).

I have a TLX-1361V-LOY1 -Display and iam an absolut newbie.
How do i have to connect the lcd pins with the lpt

i found this link http://www.skippari.net/lcd/kytkenta.html! thats annother lcd and the pins at the lcd are not the same.

e.g. in the datasheet of the lcd the pin 3 is not used!!!

is it right if i only change the pins of the lcd there with the pins of my lcd???

does anybody know to connect this lcd correctly!

thanks
marco

I could probably tell you how to connect it if I could see the datasheet. Could you post it here ?

Supply Voltage: VDD min: 4.75 typ: 5.0 max: 5.25
VEE min: -10.5 typ: -10.0 max: -9.5


1 Nc
2 VEE Powersupply for LCD Drive (Should be variable) ?????
3 Nc
4 CE
5 C/D
6 WR
7 RD
8 RESET
9 D0
..
16 D7
17 GND
18 BL-
19 VDD Powersupply for Logic ??????
20 BL+


i dont have a pdf file of the datasheet, only 40 sheets.

Do i need an external supply power or has the lpt port the power to let lcd work!

Marco

It should work if you connect it using the pin names shown here:
http://www.skippari.net/lcd/t6963c_schem.html

I didn't see any pins missing or any extra pins, looks like they are just in different order.

To the pin 19 ( VDD ) you should connect +5v and to pin 2 ( VEE ) you should connect some variable powersupply that gives about -10v. The circuits at my schematics page should work for this.

You can't get the power from lpt port but you can get +5v from the computer. You can get -12v inside the computer also and use a 10kohm potentiometer to adjust it to -10v. This way you won't need the negative voltage circuit at all.

i adapt the table, please check if its right and i have some other questions


--------
What i have to do with the Reset Pin 8? Do i hve to connect it with 5V Loggic Power Supply like in your schematic.
------------
I also have an backgroundlight which has the following notes in datasheet.
LED Forward Voltage : I = 350mA ; U = 4V (max).

How can i generate 4V?
5V Pc connect with 10kohm potentiometer ?!
is the amperage important?


Thank you for your help

Marco

That's very easy , just put a 100 ohm potentiometer between the negative (K) pin of the Led backligght , and conect teh positive to the 5 5 volt lead , and there you go , you can now control your backlight from full bright to off

Hope to have helped.

SAmtech

OOps , forgot to login

i think i understand, what mean K?
In the lcd is a bulit-in poti for the contrast but max. 4V
i still have to know what should i do with the reset pin!

thx

Marco

i measure the pc-voltage and it is not -12V but +12V or did i measure wrong?

Marco

oh i made a big error i had to change the 12V and GND with GND 12V, so i have -12V

I don't see anything strange here.


Yes, connect it to +5v.


As samtech already mentioned you could use a potentiometer to drop the voltage. But something that concerns me with this is that if you turn the backlight off using the pot it might get very warm and even burn. Of course this depends of the potentiometer used.

You could also use a fixed resistor with it.
Here's a place to do some calculations: http://www.bit-tech.net/article/68/

Using the values
Supply voltage: 5
Diode forward voltage: 4
Diode rated current: 350

it gives 3.3 ohm for the resistor value. You can see the calculator also gives you the power dissipations that may be of some help in deciding what to use.

From the drive connector you can only get +5v and +12v. You can get the -12v from the atx connector going to the motherboard. Because of this I would recommend using some inverter circuit as shown at my schematics page to make the -10v from the +5v line.


Unfortunately switching them like that won't work in this.
If you take the +5v you use the red +5v and black GND lines.
If you then take -12v like you said you are using black GND for -12v and yellow +12v for GND.
As you can see you are connecting GND and +12v for the ground potential and connecting them together can't be good.

EDIT:
After reading samtech's message below I'am now thinking that I wasn't clear enough what I meant above: don't try it - you'll fry your display like samtech said. Ok maybe you won't fry it because PSU's protection circuit will probably shut it down because of the short between +12v and GND but anyway I don't recommend trying it.


If someone knows this better I'd like to be corrected.

Weel by doing that i'll fry the display , its' beter or to make a separate power suply for the lcd , or to go on and take the power from the ATX plug.

SAmtech