Need more information about display with sanyo chips
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Author:  Trolex [ Fri Feb 18, 2005 20:16 ]
Post subject:  Need more information about display with sanyo chips

I found this display yesterday, so I think that maybe I can wire it to my PC. But problem is, I did not found much info about the display.

I can found these informations from display:
Hitachi LM300XN


and there are these chips:
One of: Sanyo LC7942
Three of: Sanyo LC7941
Three of: Sanyo LC7940

I hope someone can find more information and maybe wiring for this display.

Author:  Myscha [ Sat Feb 19, 2005 11:03 ]
Post subject: 

This display seems to have no controller. The Sanyo ics are only common and segment drivers. You can follow the pins of the ics and compare it to one of the schematics at the end of the datasheets. Then you need a controller like the Epson SED1330/1335 for it...

Could you make and upload some pics of the display?

Datasheets for the ics can be found there:
LC7940+LC7941 -> ... 0-41YC.pdf
and there:
LC7942 -> ... LC7942.pdf

Author:  Trolex [ Sat Feb 19, 2005 11:16 ]
Post subject: 

Yeah I can, I'll do it later today :) But do you know how to wire that Epson SED1330/1335 with it and LPT port? cause this display is from barometer ;P so I think I maybe can find some controller chips from it.. cause I have the whole barometer, but it's broken, but I think display is working :)

But I'll take those pics soon

Author:  Trolex [ Sat Feb 19, 2005 11:44 ]
Post subject: 

Now here is some pics:



Author:  Myscha [ Sat Feb 19, 2005 13:52 ]
Post subject: 

That looks to me like a 240x64 display or anything like this...

You can download the SED datasheet here for example: ... 40&index=0

On page 133 you can find an example that shows how to connect the controller to a display and to the microcontroller (your pc)...

But first you should try to find out how the ics on your display are connected to each other.

Author:  Trolex [ Sat Feb 19, 2005 17:29 ]
Post subject: 

:/ I'm quite new with these things so I need help :< I don't know how to make wirings, can someone make me wiring for this display? and where can I get those SED1335 chips

Author:  Myscha [ Sun Feb 20, 2005 11:04 ]
Post subject: 

Do you have a "multimeter"? I don't know the right english word for what i mean. You can measure resistance, current, voltage, etc. with that...

You need the SED, a crystal oscillator, (display) ram and some resistors and capacitors. And time... ;)

Where are you from? I only know where to get the SED in Germany. It costs about 15€.

Author:  Trolex [ Sun Feb 20, 2005 12:03 ]
Post subject: 

Yes I have multimeter, and I'm from Finland..

I found some chips which were in same machine as the display,
there are two connection spikes, 10-pin connector, and 20-pin connector, and there is one chip which is Sanyo LC3517BL-15. there is some other chip too, but I don't know what it is.

Author:  Myscha [ Sun Feb 20, 2005 16:23 ]
Post subject: 

Could you make a picture of that, too? And post all the ic names you can find

Author:  Trolex [ Sun Feb 20, 2005 16:24 ]
Post subject: 

I'll take pics soon. And I'll post everything what I can found :)

Author:  Myscha [ Sun Feb 20, 2005 16:28 ]
Post subject: 

The Sanyo LC3517BL-15 is the ram of the controller

Author:  Trolex [ Sun Feb 20, 2005 16:28 ]
Post subject: 

Hm.. is there any display controllers from sanyo? or toshiba? cause there was two toshiba chips I'll post description of them soon

Author:  Trolex [ Mon Feb 21, 2005 8:09 ]
Post subject: 

Hitachi HD61830, I found that chip from the other card which was in the same machine, I think it's lcd graphic controller cause I found it with google, now I need to know how to wire this HD61830 to lcd display, and how to wire it to lpt.

Author:  coorz [ Mon Feb 21, 2005 9:04 ]
Post subject: 

The HD61830 is indeed a supported controller, wiring examples can be found here.

Author:  Myscha [ Mon Feb 21, 2005 9:16 ]
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Is there no cable between those cards?
I only worked with SED until now - i first have to read the datasheet of the Hitachi

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