A little trick is to steal your -ve voltage from the 232 driver. There is
usually around -10V available from one of the charge-pump capacitor pins
that you can divide down (using a pot is ideal) to get what you need.
|---------+------------------------------------->
| | "alipiec" |
| | <
| | ixdorf.com> |
| | |
| | 16/03/2005 11:54 a.m. |
| | Please respond to ts-7000 |
| | |
|---------+------------------------------------->
>-----------------------------------------------------------------------------------------------------------|
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| To:
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| cc:
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| Subject: [ts-7000] LCD display
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Did anyone try to connect any LCD graphical display to TS-7250? The
problem is that pin called "bias" - for contrast adjustments, has
positive voltage (approx 3.3V) - but displays i tried to connect
needed negative voltage (~ -7V). Is there any possibility to connect
non-character only display (lcd matrix - HD4779 or LC7981)? Does
someone know what model could be used with this SBC?
I can write my own drivers but first I have to find possible LCD
models.
Regards
Alus
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