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Messages - bradw

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1
Graphic LCDs / Re: C12864WC - Capacitors
« on: August 04, 2014, 09:46:53 AM »
Thank you for the other set of eyes! The display is now working.


2
Graphic LCDs / Re: C12864WC - Capacitors
« on: July 31, 2014, 11:50:21 PM »
Hi Michael,

Thanks for the response. I loaded your code onto my arduino mega, but no luck. Just get a blank screen. Seems something must be wired wrong. I was using uno before with serial interface. I wired to mega with parallel, as that looks like what your code is set up for. I read online that PORTA 0-7 on the mega is digital pin 22-29. I added the following code in the setup function the to set 8080/parallel, and tied them to lcd pin 29/30.

pinMode(4, INPUT);           // c86
digitalWrite(4, LOW);       //
pinMode(5, INPUT);           // ps
digitalWrite(5, HIGH);       //

I posted a couple pictures, maybe you can spot something from them.

https://drive.google.com/file/d/0B2wYgm2nW69rYlNMel84dDJDNnM/edit?usp=sharing
https://drive.google.com/file/d/0B2wYgm2nW69ram5ydXdxam1VclE/edit?usp=sharing
https://drive.google.com/file/d/0B2wYgm2nW69rQy1lTUJ3eWJiUVk/edit?usp=sharing
https://drive.google.com/file/d/0B2wYgm2nW69rSDdadHNfckNBSXM/edit?usp=sharing

Any help is appreciated. Would you happen to have sample code that uses serial (spi)?

Regards,
Brad


3
Graphic LCDs / C12864WC - Capacitors
« on: July 31, 2014, 12:12:01 AM »
Hi,

I purchased this COG LCD (http://www.newhavendisplay.com/nhdc12864wcfswfbw3v3-p-4048.html) and the FFC30 adapter board (http://www.newhavendisplay.com/nhdffc30-p-2477.html) with the hope that I can get it connected to a breadboard and arduino. This is my first time working with a COG LCD and I am not sure what capacitors I should use. Per the data sheet (http://www.newhavendisplay.com/specs/NHD-C12864WC-FSW-FBW-3V3.pdf), it states 1uF and 1uF-2.2uF caps are required. I did a search on digikey, jameco, radioshack and other sites and find hundreds of options matching this criteria. I ended up ordering these:

https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=81509
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=33736

With everything hooked up, the display is not working right. It will flash 'hello world' and quickly dissolve away. I suspect the capacitors, as this is the piece I know the least about.

Could you verify these are ok to use or suggest what I should be using with this display?

Regards,
Brad

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