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Messages - Paul_B

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Evaluation Tools / Re: NHD-TFT40 PWM pin
« on: August 29, 2017, 10:53:58 AM »

The NHD-TFT40 is designed to work with our 24-bit Parallel RGB Interface TFT displays that require the RGB pixel data to be clocked in continuously.

The backlight driver defaults to 40mA and can boost up to ~24VDC for up to 7-LED strings. Check your display datasheet for the string configuration.

Per your request I pulled the NHD-TFT40 from stock and connected it to the NHD-4.3-480272EF-ATXL#.

Please see the attached images, note that when the PWM signal is tied to GND the backlight turns off as expected.

Evaluation Tools / Re: NHD-4.3CTP-SHIELD-N
« on: August 24, 2017, 07:51:54 AM »
Morning Carl,

Very strange, I know this might sound odd but can you please tell me what brand micro SD card you are utilizing?

Regarding the MEGA you can always bypass the LDO by powering the board with a USB wall charger.

At this time I'm not aware of any Energy Efficient Arduino MEGA clones.

Evaluation Tools / Re: NHD-4.3CTP-SHIELD-N
« on: August 22, 2017, 03:39:57 PM »
Hey Carl,

I went ahead and pulled the NHD-4.3CTP-SHIELD-N from stock and powered it with an Arduino UNO clone (NERO) from the lab.

All three sketches have been tested and verified to run properly on the Arduino UNO (see picture attached)

Can you please clarify how you are powering the Arduino UNO clone?

Have you been successful running the "Basics" Arduino examples (


Character LCDs / Re: NHD-0240A2 Can't write to location 30 in either row
« on: August 11, 2017, 04:10:50 PM »
Glad to hear you got your display up and running!

Thanks for sharing your solution, it will definitely help others  :D

TFTs / Re: NHD-10.1-1024600AF-LSXV-CTP #SUPPORT
« on: August 10, 2017, 03:45:07 PM »

Please note that the NHD-10.1-1024600AF-LSXV#-CTP does not utilize a "controller board".

The TFT display uses a LVDS interface. LVDS is quite straight forward, and is just parallel data serialised 7:1. The RGB, DE, and syncs go in defined places.

Does your source output LVDS?


OLEDs / Re: Controller questionfrom a newbie
« on: August 10, 2017, 03:28:14 PM »
Welcome to the forum  8)

To keep things simple the "Controller" or driver chip manages the display.

Take as an example the NHD-1.69-160128ASC3:

This display utilizes the SEPS525 controller and you will communicate via 4-wire SPI to your MCU.

The controller or driver chip is bonded onto the displays cable via a COF (Chip-On-Film) process.

Hope this helps!

Evaluation Tools / Re: NHD-4.3RTP-SHIELD-V Problem
« on: August 04, 2017, 01:33:56 PM »

Thanks for the update, enjoy the rest of your evening  :o

Evaluation Tools / Re: NHD-4.3RTP-SHIELD-V Problem
« on: August 02, 2017, 12:01:25 PM »
Hey Matt,

If it's not a genuine Arduino you can never be quite sure what you are getting. It sounds like the MEGA2560 clone in addition to the NHD-4.3RTP-SHIELD-V is drawing to much power. To prevent damaging your computer, the USB device drawing too much power has been disabled. Other devices may have also been disabled. When you disconnect the device drawing too much power, your other USB devices will be enabled again.

You can utilize a cheap USB Power Meter to monitor how much power is being drawn. If you notice to much power is being drawn between the two devices try dimming the backlight on NHD-4.3RTP-SHIELD-V to drop the current consumption.

The backlight control pin is a pulse width modulated (PWM) signal controlled by two registers: REG_PWM_HZ and REG_PWM_DUTY. REG_PWM_HZ specifies the PWM output frequency, the range is 250-10000 Hz. REG_PWM_DUTY specifies the duty cycle; the range is 0-128. A value of 0 means that the PWM is completely off and 128 means completely on.

Hope this help!

Evaluation Tools / Re: NHD-7.0CTP-CAPE-N no picture
« on: July 31, 2017, 04:17:25 PM »

Thank you for the information, manual updates will be required to enable all aspects of the display when using the 4.x debian kernels (stock operating system).

The BB-BONE-NH7C-01-A0.dts overlay is available for download here:

Please note that it was recently added to the default BeagleBoard Debian Image by Robert Nelson and will not be installed on the beaglebone black directly out of the box.

You are not obliged to install Ubuntu, the software support is as follows:

  • Ubuntu with Kernel 3.15, 3.17, 3.18, 4.1 support (with SGX).
  • Ubuntu with Kernel 3.8 (device tree) support.
  • Rowboat android 4.2.2 with Kernel 3.2 support.
  • AOSP Android 4.4 with Google apps support
  • 4.x Debian

Best Regards,

Customer Projects / Re: Clock and weather display
« on: July 11, 2017, 10:50:04 AM »
Brilliant, thank you for sharing Dave! Did you spin your own PCB? I would be interested in seeing a picture of the back of the weather station  ;)

TFTs / Re: Using RGB666 on NHD-4.3-480272EF-ATXL#-T
« on: June 14, 2017, 08:04:48 AM »
You can also wire them to the upper bits, in sequence  ;)

TFTs / Re: Using RGB666 on NHD-4.3-480272EF-ATXL#-T
« on: June 14, 2017, 08:02:54 AM »
Hello carrasco,

One approach is to wire all the unused bits to a fixed value (typically zero - Ground). Please note that you do not need to utilize a pull-down resistor. 

Evaluation Tools / Re: NHD-7.0CTP-CAPE-N Picture offset
« on: May 10, 2017, 08:06:32 AM »
Not a problem, you should receive the patch files via eamil shortly  ;)

Evaluation Tools / Re: NHD-4.3CTP-SHIELD-N
« on: May 03, 2017, 12:11:44 PM »
Thank you for contacting me with this inquiry, I am happy to help clarify how you can prototype with our 4.3" Arduino Shield with Capacitive Touch!

Since you'll probably be connecting other things to the Arduino (LEDs, sensors, servos) you can purchase a breakout shield and sandwich the two together. Another option to purchase an Arduino clone that has the I/O pins brought out on a second connection.

The NHD-4.3CTP-SHIELD-N is compatible with the Arduino MEGA straight out of the box, no solder jumpers need to be configured. By default it will utilize the ICSP/SPI header which is on most genuine Arduino’s.

Finally, our advice is to stick with a 7V - 8V DC adapter since most Arduino's utilize a cheap LDO and have trouble regulating at higher voltages. 

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