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 Forum index » DIY Hardware and Software » Microcontrollers and Programmable Logic
Question about LCD's
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Wed Jan 09, 2008 7:33 pm    Post subject: Question about LCD's
Subject description: You might be the right people to ask
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I was looking at this LCD on BG Micro and noticed it says "needs EL inverter". What does that mean?

http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=10605

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Danno Gee Ray



Joined: Sep 25, 2005
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PostPosted: Wed Jan 09, 2008 7:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

It means you would have to purchase or make another board to invert the DC input power to a low amperage 120VAC required to power the Electro Luminescent backlight.
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crashlander42



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PostPosted: Wed Jan 09, 2008 7:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Shocked

Ok. I'll pass on that one.

thanks!

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Danno Gee Ray



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PostPosted: Wed Jan 09, 2008 8:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

No problem. Check the surplus houses for the inverters, they shouldn't cost too much there.
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State Machine
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PostPosted: Thu Jan 10, 2008 5:08 am    Post subject: Reply with quote  Mark this post and the followings unread

Here is a guy who sells the inverters for $8.00 ........

http://techknowman.com/Electronics/Kits/Kits.htm

Bill
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crashlander42



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PostPosted: Thu Jan 10, 2008 7:52 am    Post subject: Reply with quote  Mark this post and the followings unread

I could, but then I'd be up to $13ish. I think I'll just order a 16x2 blue LCD from Futurlec for $9ish. I was going to order some other stuff from them anyway.

I'm getting ready to build my ucApps Midi2CV. Very Happy I've been waiting to do this for a while.

Thanks anyway!

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State Machine
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PostPosted: Thu Jan 10, 2008 9:01 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
could, but then I'd be up to $13ish. I think I'll just order a 16x2 blue LCD from Futurlec for $9ish. I was going to order some other stuff from them anyway.

I'm getting ready to build my ucApps Midi2CV. I've been waiting to do this for a while.


Certainly. This makes more "dollar" sense and it will look lots slicker Wink

Please report the projects progress for us ! Very Happy

Bill
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bugfight



Joined: Aug 02, 2007
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Location: Arlington, TX USA

PostPosted: Thu Jan 10, 2008 2:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

crashlander42 wrote:

I'm getting ready to build my ucApps Midi2CV. Very Happy I've been waiting to do this for a while.


make sure you check out the new aout_ng module for cv.

i've avided the EL lcds, since ones with LED backlights are easy enough to get.
note that some lcds require negative voltage for the contrast input.
(i have a few of those sitting unused)
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State Machine
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PostPosted: Thu Jan 10, 2008 7:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have used these LCD's in the past from Scott Edwards Electronics. They have the serial backpacks which make life easier for programming the displays using a USART. I wrote the low level "papallel" drivers for these type displays when I was using 8051 type MCU's but by the time I got with using other processors, I started using the serial LCD units.

http://www.seetron.com/slcds.htm

These guys are good if you need a quick fix. They make building block type IC's ........

http://www.elabinc.com/Semiconductors/AboutSemiconductors/tabid/71/Default.aspx

I used one of their serial LCD controller IC's a while back for a rocket payload data logger project .......

Bill
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