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81
TFTs / NHD 5.0 800480 resistive touch screen non-linearity
« Last post by dfansler on September 06, 2017, 10:45:28 AM »
I have a problem with the resistive touch display on the above display.  On the right end of the display, if I am measuring the resistance from top to bottom, it changes by 300 ohms (increasing from top to bottom).  Reading the horizontal position on the right edge should give the same value from top to bottom - instead the value increases.  This means that if I scale the value to be 800 on the right side, it will go from say 800 at the top to 850 at the bottom.

Is there a problem with the touch screen, or my logic?
Kind regards,
David
82
Evaluation Tools / Re: NHD-TFT40 PWM pin
« Last post by dttworld on September 05, 2017, 01:24:37 PM »
I believe I understand my problem now. The backlight converter on the eval board is a boost converter designed to drive a series LED backlight. I actually need a buck converter designed to drive the parallel LED backlight found on the HD-1.8-128160EF-CSXN-F.
83
OLEDs / Re: LCD Dev Board and NHD-1.69-160128UGC3
« Last post by Saurabh_B on September 05, 2017, 07:58:52 AM »
The Code loaded into the NHDev Development board is written for 6800 mode Parallel Interface.
It will not work in serial.
84
OLEDs / LCD Dev Board and NHD-1.69-160128UGC3
« Last post by ERS on September 04, 2017, 08:50:28 AM »
Has anyone got this combination to work?
We wired them assuming a serial connection but display doesn't work.

Any advice would be appreciated.
85
Evaluation Tools / Re: NHD-TFT40 PWM pin
« Last post by dttworld on September 01, 2017, 01:23:00 PM »
So I swapped out the backlight IC with one bought from Mouser. Unfortunately, the PWM pin tied to gnd still doesn't turn off the backlight current. For this test I am actually lighting up 5 LEDs in parallel with the demo board. This really doesn't make sense to me.

Could you run a test where you light up 5 parallel LEDs and see if tying PWM to gnd turns the LEDs off?

Thank you
86
New Product Wishlists / Re: Display, PC simulator
« Last post by Saurabh_B on September 01, 2017, 08:09:19 AM »
Hello,

Unfortunately we do not have any LCD simulators.
87
OLEDs / Re: SEPS525 is only 3.3V tolerant?
« Last post by Paul_B on August 31, 2017, 07:59:02 AM »
Morning,

The NHD-1.69-160128UGC3 is 3.3V tolerant.
http://www.newhavendisplay.com/nhd169160128ugc3-p-5603.html

The NHD-1.69-160128ASC3 design includes built-in logic level shifting so you can use it with 3-5VDC power and logic levels  8)
http://www.newhavendisplay.com/nhd169160128asc3-p-9288.html

Hope this helps!

88
New Product Wishlists / Display, PC simulator
« Last post by Pepo12 on August 31, 2017, 07:42:41 AM »
Hi,



Do you have any simulator that run in Windows PC?

Im interest to simulate the funcionality of display like "NHD-0240BZ-NSW-BTW-P" or "NHD-0420D3Z-NSW-BBW-V3". Via RS-232.

Thanks!



Aldo.
89
OLEDs / SEPS525 is only 3.3V tolerant?
« Last post by bobgardner on August 30, 2017, 08:44:18 PM »
5V spi makes it unhappy? Just checking.
90
Evaluation Tools / Re: NHD-TFT40 PWM pin
« Last post by dttworld on August 29, 2017, 06:10:41 PM »
Thanks for running the test on your end.

I am using the eval board for just the backlight function set to 90mA.

 I should be receiving my parts from Mouser on Wednesday and will provide an update after I do some testing.
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