Optrex DMC2059 LCD

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Chopper Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2005, 10:59 am
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Hi all

A while back Oatley Elecronics had the Optrex DMC2059 LCD's for sale.  (12cm
x 3cm display area). I got some & have just found a use for them.
Unfortunately I haven't had any success with getting them going. I haven't
had any (well many) problems with other types of LCD (16x2 & 40x2).

Has anyone out there who also purchased them got them going? A search of
Google revealed similar units but not the '2059. All other OPTREX units
appear to use the standard LCD initialization etc.

Any help would be apprciated. Thanks

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Chopper

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Mark Harriss Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2005, 11:11 am
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Re: Optrex DMC2059 LCD


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  Have you found the "LCD faq" on the net yet?, I had a
batch of character displays that were STN type and needed
about -1.5V on the contrast to make the characters visible.

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Chopper Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2005, 12:30 pm
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Re: Optrex DMC2059 LCD


Hi Mark

I found a few people asking the same questions but no answers

Thanks for the suggestion

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Chopper

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Frank Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2005, 6:49 pm
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Re: Optrex DMC2059 LCD


It needs a bit of a "power up" routine,
have you been through  that?




Hi Mark

I found a few people asking the same questions but no answers

Thanks for the suggestion

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Chopper

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Chopper Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2005, 8:29 pm
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Re: Optrex DMC2059 LCD


Hi Frank

I am using a routine similar to other OPTREX units. Is there anything
specific about this type?


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Chopper

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Frank Contact options for registered users 's Avatar (by Gravatar) posted on
July 29, 2005, 6:02 am
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Re: Optrex DMC2059 LCD


The best way I can answer your question, is the LCD controller or driver on
this URL below?
http://www.eio.com/datashet.htm




Hi Frank

I am using a routine similar to other OPTREX units. Is there anything
specific about this type?


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Chopper

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Chopper Contact options for registered users 's Avatar (by Gravatar) posted on
July 29, 2005, 11:19 am
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Re: Optrex DMC2059 LCD **SUCCESS**


Hi all

Success. It required about -4V on the contrast pin. (pin3)

Thanks all for your help.

It worked for 2 displays.

All I need now is a convenient -4V

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Chopper

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Mark Harriss Contact options for registered users 's Avatar (by Gravatar) posted on
July 29, 2005, 11:31 am
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Re: Optrex DMC2059 LCD **SUCCESS**


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I was able to suck mine off a MAX232 ic I already had
on my board for the RS232 interface: it makes -9V.

Regards
Mark

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Chopper Contact options for registered users 's Avatar (by Gravatar) posted on
July 29, 2005, 9:33 pm
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Re: Optrex DMC2059 LCD **SUCCESS**


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Good thinking.

I also found that it needed about 15V @ 60 mA for the backlighting


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Chopper

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