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| Just wonderin bout your schematics http://forum.lcdinfo.com/viewtopic.php?f=6&t=17 |
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| Author: | Georg [ Tue Oct 08, 2002 9:41 ] |
| Post subject: | Just wonderin bout your schematics |
I just got myself a TLX-711A and now i was searching for some stuff to use with it. May i ask why you set the Pin you identified as FS0 to high if the smaller font would be setting it low and why do you say it's to change the the character size from low=8x8 to high=6x8 if it can by the specs only change between high=5x8 and low=6x8 if FS1 is high or high=7x8 and low=8x8 if FS1 is low 
tell me what i misunderstood or who of us is wrong plz tnx n greetz  madGEORGE
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| Author: | Henri [ Tue Oct 08, 2002 16:28 ] |
| Post subject: | Re: Just wonderin bout your schematics |
Georg wrote: I just got myself a TLX-711A and now i was searching for some stuff to use with it.
May i ask why you set the Pin you identified as FS0 to high if the smaller font would be setting it low and why do you say it's to change the the character size from low=8x8 to high=6x8 if it can by the specs only change between high=5x8 and low=6x8 if FS1 is high or high=7x8 and low=8x8 if FS1 is low Pin 19 in the TLX-711A header is the FS1 pin on the T6963C chip and FS0 is always low and isn't meant to be changed. TLX-711A also has a pull-up resistor in the FS1 pin so if you leave it not connected it chooses the 6x8 font. 
Could you please let me know where I've said the pin to be FS0 so that I can correct the mistake ? I haven't found the TLX-711A datasheet anywhere from net but I have a paper version in my hands just at the moment. Maybe I could scan it someday when I have access to a scanner. |
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| Author: | Guest [ Thu Oct 10, 2002 9:46 ] |
| Post subject: | |
i do have the data sheet of the t6963 and you were right  i just rang throug the contacts fast and  counted wrong so it is really FS1
so you say there is an internal pull up resistor ... may be true i just got the datasheet of the t6963 not of the tlx-711a but i don't really get why you set it to high if you say in your description for 8x8 it needs to be set to low? (i took that from your schems page) did you do the programs and schems on your own? because i can t really figure out why you use specificly autofeed, select-in, init and strobe on the parallel port or was it just randomly picked? 
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| Author: | xF-K!ll4 [ Thu Oct 10, 2002 13:34 ] |
| Post subject: | -7,8V |
is there any other way to get the -7,8V for the contrast or can i leave it for testing purpose? |
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| Author: | Henri [ Thu Oct 10, 2002 20:32 ] |
| Post subject: | |
Anonymous wrote: i do have the data sheet of the t6963 and you were right i just rang throug the contacts fast and counted wrong so it is really FS1 No problem Quote: so you say there is an internal pull up resistor ... may be true i just got the datasheet of the t6963 not of the tlx-711a but i don't really get why you set it to high if you say in your description for 8x8 it needs to be set to low? (i took that from your schems page) Well I've set it to high (6x8 font) because I wan't to use the 6x8 pixel font. Was there something I didn't understand in your question ?  Quote: did you do the programs and schems on your own? because i can t really figure out why you use specificly autofeed, select-in, init and strobe on the parallel port or was it just randomly picked?
I've done LCDInfo and the test programs myself but the t6963c schematic is from someone else. I don't know who has done it. There are couple different shematics that are mainly used for these displays. |
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| Author: | Henri [ Thu Oct 10, 2002 20:38 ] |
| Post subject: | Re: -7,8V |
xF-K!ll4 wrote: is there any other way to get the -7,8V for the contrast or can i leave it for testing purpose?
There are many ways to get -8v. One way is to get -12v from ATX psu and use a potentiometer to adjust it. You need the -8v contrast voltage to get anything to the screen. |
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| Author: | K!ll4 [ Fri Oct 11, 2002 0:56 ] |
| Post subject: | TNX |
great idea with the minus 12 i didnt know it uses the same ground as...wait....leads me to another question shall i use the ground of the parallel port or the ground from the power line? (i assume you used the internal power kabels ?) |
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| Author: | Henri [ Fri Oct 11, 2002 15:52 ] |
| Post subject: | Re: TNX |
K!ll4 wrote: great idea with the minus 12 i didnt know it uses the same ground as...wait....leads me to another question shall i use the ground of the parallel port or the ground from the power line? (i assume you used the internal power kabels ?)
You should use the power line ground. But you should also connect the parallel port ground to the display ground. Without that there may be some problems with the parallel port signals (garbage etc.). |
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| Author: | Guest [ Fri Oct 11, 2002 17:14 ] |
| Post subject: | |
hm... then what s the internal resistance of the display so i can find out what poti to use? |
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| Author: | Henri [ Fri Oct 11, 2002 19:00 ] |
| Post subject: | |
Anonymous wrote: hm...
then what s the internal resistance of the display so i can find out what poti to use? I don't know about the internal resistance but I guess 10kohm pot should be fine. That's what I've been using with several different displays. Or maybe you could try 20kohm. |
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| Author: | Guest [ Sat Oct 12, 2002 1:28 ] |
| Post subject: | iiieeehk |
while messin around i forgot to put in any and i attached it to minus 12v we ll see if it s still alive...well i bout it for 2€ so i could live with the loss
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| Author: | Guest [ Mon Oct 14, 2002 10:24 ] |
| Post subject: | Re: iiieeehk |
Anonymous wrote: while messin around i forgot to put in any and i attached it to minus 12v we ll see if it s still alive...well i bout it for 2€ so i could live with the loss
Is the display still alive ? |
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