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Messages - Michael_L

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301
TFTs / Re: NHD-4.3-480800EF-CTXP#-T - Broken?
« on: April 29, 2014, 10:49:00 AM »
Please email quality@newhavendisplay.com to setup an RMA for this.

302
Graphic LCDs / Re: Arduino MEGA 2560 + NHD240128
« on: April 29, 2014, 10:31:53 AM »
Are you seeing anything on the display?  Do you have any others to test?  Also, can you please provide the full part number of the display?

303
Character LCDs / Re: Driving backlight for NHD-C0220BiZ-FSRGB-FBW-3VM
« on: April 29, 2014, 10:19:24 AM »
There are no current limiting resistors on the backlight circuit of this display.  You would need to add these to limit the current.

304
Character LCDs / Re: NHD-0216K3Z-FL-GBW-V3 via SPI Help Requested
« on: April 29, 2014, 10:14:25 AM »
Have you looked at our serial interface  character LCD example code on our website?  Here is a link to it below:
http://www.newhavendisplay.com/app_notes/Serial_LCD.txt
You will see that in the example code, the various modes of serial communication are shown.  You will only need to focus on the SPI interface sections of code.
This will show you not only how to write to the display via SPI (timing, protocol) but also how to initialize it correctly.

305
Character LCDs / Re: Interface to 3.6 volt MCU
« on: April 29, 2014, 10:10:01 AM »
That display should not be powered with less than 4.7V as indicated in the spec.  This goes for VDD and also the logic levels.  As for the data lines, the voltage is determined by the microcontroller when writing to the display only.

306
Character LCDs / Re: Issues upgrading to NHD-0220D3Z-V3
« on: April 25, 2014, 12:22:30 PM »
It is a lot code, and the display I was testing is 112680-11-03-23.  Please email us at nhtech@newhavendisplay.com if you would like to submit an RMA form.

307
Character LCDs / Re: Issues upgrading to NHD-0220D3Z-V3
« on: April 25, 2014, 09:54:30 AM »
Do you have another V3 display you could try?  As I mentioned, I tested this display without the need to ground any additional pins and it worked properly.
If you do have other V3 versions you can try, please confirm if these work correctly or if they are experiencing this same issue.
If not, would you be willing to purchase another sample to test?

308
Character LCDs / Re: Max Voltage on NHD-0108CZ-FSW-GBW-33V3
« on: April 25, 2014, 09:09:14 AM »
We cannot guarantee reliable operation, nor do we test our displays, at levels higher or lower than what is shown in the spec.  However, the display will most likely operate at those levels (the backlight should not be over-driven).  You may order a sample to test it with your supply to see if it works for you if you like.  But, since you are interested in using a battery for the supply, have you looked at any of our character COG displays?  They draw less current, and can some can be used at those levels.

http://www.newhavendisplay.com/nhdc0216czfswfbw3v3-p-1828.html

http://www.newhavendisplay.com/nhdc0216cizfswfbw3v3-p-2930.html

309
Character LCDs / Re: Issues upgrading to NHD-0220D3Z-V3
« on: April 25, 2014, 08:55:54 AM »
I have just tested that display to confirm operation with only the use of 3 pins, without any other pins needing to be grounded.  The 3 pins I used were pins 1-3, RX, VSS, VDD.  Using only these 3 pins, the display was fully functional.  We have never seen this issue before where that pin needs to be grounded in order for the RS232 to work.  Do you have some connection to these pins?  Or are they completely disconnected from any other devices/circuitry as they should be?

310
TFTs / Re: NHD-4.3-480800EF-CTXP#-T without controller
« on: April 24, 2014, 10:27:29 AM »
I'm sorry but this display is unavailable without the built-in controller.

311
TFTs / Re: NHD-7.0-800480EF-ATXV reset
« on: April 22, 2014, 05:04:55 PM »
Having no control over the AVDD line is not an issue, this is handled by the controller board.  Since you said you had the display working fine, the problem seems to be something to do with your MCU or how it is powering up.  I would tell you to ensure you are handling the reset line correctly at power on, but since you have it working with your processors debugger, it seems like you are already meeting this requirement.  Is there any way to make sure the reset line is low at the very beginning of your code and then bring it high, wait 250ms, pull it low, wait 250ms, and bring it high again and wait another 250ms?
Is the power supply different between the two ways you tried running the display?

312
Character LCDs / Re: Issues upgrading to NHD-0220D3Z-V3
« on: April 22, 2014, 04:58:45 PM »
It sounds like it is something to do with the timing.  Not the baud rate of the rs232 itself, but rather the timing between writes/commands.  Can you try adding a delay between writes?

313
TFTs / Re: NHD-7.0-800480EF-20 Voltage Levels
« on: April 22, 2014, 01:14:09 PM »
Both the B/L enable and Display On pins can be left as no connects.  This should free up a couple of valuable I/O lines on your MCU!  :)

314
TFTs / Re: NHD-4.3-480800EF-CTXP# driver question
« on: April 22, 2014, 01:10:45 PM »
You are correct.  The orientation does not matter for this display as it uses IPS technology, and has 80 degree viewing angles from all sides.
There is nothing that will reduce the image quality if the display is used in landscape mode.

315
OLEDs / Re: NHD-2.8-25664UCY2 PCB revisions?
« on: April 22, 2014, 10:28:37 AM »
Thank you for your feedback.  Are you currently using the display?  Are you experiencing any issues?  The display can be configured different ways, and the way we have designed it not only works for our testing purposes, but also for many of our customers.  If you would like to share any suggestions or design alternatives with us, please feel free to email us at nhtech@newhavendisplay.com.


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