Recent Posts

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21
TFTs / TFT Display with Beagle Green
« Last post by imsaditya on January 02, 2019, 06:32:49 AM »
Hi,
We are using Beagle Bone green board. Using default(pre built Linux image) linux image on beagle bone green board. Linux Kernel booting on the board.
When i have connected NHD display "NHD-5.0-800480TF-ATXL#-CTP" and power On the board, board does not  boots  as the board LEDS are not blinking
And  no display on the NHD display.

The connection details between NHD display and beagle green board is attached:

Could you kindly suggest if i need to check any configuration or configuration change that enable LCD display on beagle green board
Thanks,
Aditya
22
TFTs / Re: NHD-5.0-HDMI-N-RTXL-CTU Digital Dimming Control
« Last post by georgek on January 01, 2019, 04:52:03 PM »
It is not a solution, it is just a test that proves that our one-wire commands are correct. Removing D8 from the Display board eliminates the ACTIVE signal. This affects negatively the behavior of the display when it is powered on.
23
Character LCDs / Re: Mounting Question for .050" pitch LCD connector
« Last post by Alee_S on December 31, 2018, 01:57:28 PM »
Hi jimr,

I would recommend taking a look at Samtecs website (https://www.samtec.com), as they have an assortment of connectors and cables at various pitch and length that may help fulfill your requirements.



24
Graphic LCDs / Re: Newhaven Display Issues
« Last post by Alee_S on December 31, 2018, 01:45:16 PM »
Hi sherloc987!

A pot is a variable resistor that can be adjusted anywhere from 0 ohms to the maximum resistance it is rated to handle. So when the datasheet recommends a 10k~20k pot, it means any pot that has a maximum resistance within a 10k~20k range. 

However, the technique you used of connecting a series of resistors together can also yield proper contrast on the display, pending that you attain a recommended rated voltage of 0.5V across Vo (Pin 3), as shown by the electrical characteristics table on pg. 4 of the Datasheet.
http://www.newhavendisplay.com/specs/NHD-0216BZ-FL-YBW.pdf

Since you were using resistor values of 10k and above, chances are your contrast voltage on Pin 3 was too high. I would recommend you try to decrement your value of resistors connected to ground (9k, 8k, 7k, etc.) until Vo approaches 0.5 V, and if everything else is working correctly, you should start to see text appear on the display.

Hope this helps!

Please let me know if you need any further assitance!
25
TFTs / Re: NHD-5.0-HDMI-N-RTXL-CTU Digital Dimming Control
« Last post by Alee_S on December 31, 2018, 01:27:06 PM »
Hi georgek,

I'm glad you got it running! Thanks for posting your solution here as well!  :)
26
TFTs / NHD-7.0-800480FT-CSXN-CTP, issues controlling with Teensy 3.6
« Last post by ironhydroxide on December 31, 2018, 12:55:26 PM »
Hi.
recently I bought one of these screens, (7", capacitive touch) and have been trying to get any of the test/example sketches to work with it.

I'm using a Teensy 3.6, programmed with the arduino IDE and teensyduino.   The teensy is confirmed working (have used it on other projects, as well as the generic "blink").

I have the teensy/Display wiring as follows:
Teensy--NHD
CS0(dig10)--IDC6
MOSI0(dig11)--IDC5
MISO0(dig12)--IDC4
SCK0(dig13)--IDC3
dig8--IDC8
dig9--IDC7

I have also wired the display to an adjustable power supply (3.3vdc) as follows Teensy is also powered by the same supply.
Pins 1, 17, 18 to 3.3v
Pins 2, 19, 20 to Gnd

Sketch compiles and uploads without error, but I get zero response from the screen.
Any help on what to check?

Thanks
27
TFTs / NHD-3.5-320240FT-CSXN-T change to portrait
« Last post by Spyy on December 31, 2018, 06:42:06 AM »
Hi,

I have the above mentioned display and i want to change the resolution to portrait mode. It has 320*240 and i changed the following parameters:
REG_ROTATE from 0 to 3
Now it is portrait but i can not see the entire screen. I tried:
REG_HSIZE from 320 to 240
REG_VSIZE from 240 to 320
After doing this the screen stays black. So...are there other parameters that i have to change to get it into portrait ?


Thank you for your help

Torsten
28
TFTs / Re: NHD-5.0-HDMI-N-RTXL-CTU Digital Dimming Control
« Last post by georgek on December 29, 2018, 10:40:03 AM »
I've been experimenting with the NHD-5.0-HDMI-N-RTXL-CTU Digital Dimming Control with the one-wire interface and I can provide additional information.
I removed D8, this eliminates the ACTIVE signal. With D8 removed, the one-wire dimming control works fine.
29
Hi there,

Thanks for the information you have provided.

Please note that while the display is capable of running 8 or 16 bit interface, the program saved on the NHDev board is configured run the NHD-2.4240320CF-CTXI#-F display in 8-bit parallel mode only. This leads to the IMO pin, which should be tied to Vdd, since the NHDev board can only run in 8-bit parallel mode.

Also, pins DB8-15 should be used in 8-bit parallel mode, as recommended in the pin description on pg. 4 of the datasheet. The fact that you are seeing data transfer from DB0-7 instead could be an issue as to why the BMP image isn't displaying correctly. Can you verify if these hardware pin connections are correct?

Quote
I did try to check a behavior if IMO signal directry conneced but  The NHdev board was gone by 3.3V line short circuit.
Unfortunately, I could not be able to upload actual display images due to board trouble.

Can you clarify what you meant by this? Is the board unresponsive now anytime you connect power to the NHDev Board? I surely hope this isn't the case.. :(

30
New Product Wishlists / Re: Forum does not allow large attachments
« Last post by Alee_S on December 28, 2018, 09:20:43 AM »
Hello again,

Maximum attachment size has been increased to 2MB now.

Four maximum attachments per post with a total attachment size of 4MB allowed.
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