LM238XB LCD with Hitachi HD61830 controller !!
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Author:  knomic [ Sun Nov 30, 2003 20:24 ]
Post subject:  LM238XB LCD with Hitachi HD61830 controller !!

i search a wiringplan for this display, how i have to connect it to the lpt !!
maybe someone can help me, here is the data-sheet from the lcd:

and here the datasheet of the controller:

thx4help !!


Author:  Henri [ Sun Nov 30, 2003 22:14 ]
Post subject: 

This should work for LM238XB:

I have also been asked how to connect LM213XB which is a 256x64 pixel model with HD61830. I noticed it has same pinout with similar negative voltage requirements so the same wiring can be used for LM213XB also.

Author:  knomic [ Mon Feb 16, 2004 11:29 ]
Post subject: 

where i get the -13,5V from ? how can i transform 12V to 13.5V or can i use 12V instead of 13.5V too ? thx for help !!


Author:  whypick1 [ Mon Feb 16, 2004 21:21 ]
Post subject: 

You're going to need a negative voltage generator. It looks like you can't use the -12v lead from your power supply, as the datasheet says Vee needs to be between -13.25v and -13.75v in reference to ground.

Not sure where you can get a negative voltage generator (might also be called a DC-DC converter) in Germany, but I'm sure someone else here who lives in Europe knows where to get one.

Author:  Henri [ Fri Feb 20, 2004 20:00 ]
Post subject: 

I know some german electronics shop with a website sells DC-DC converters (up to -24v if I remember correctly) as I've seen it but I can't remember which one it was.

Maybe if you post some links here I might remember which one it was ?

Author:  knomic [ Sat Feb 21, 2004 12:36 ]
Post subject: 

i only know !!

i found a tutorial to build up a step-up-controller an then i can include a voltage-inverter !! maybe i can find a better solution, because thsi one is a little bit to big !!


Author:  Henri [ Sun Feb 22, 2004 23:38 ]
Post subject: looked familiar. I think it might have been there where I saw the DC/DC converters.

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