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Messages - Saurabh_B

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136
Character LCDs / Re: 2x NHD-0420D3Z I2C Problem
« on: September 21, 2016, 08:35:50 AM »
Hi,

You could power it through a 5V so long as the supply can provide enough current to run the backlight as well. Most MPUs would allow for this.
The display does have internal pull up resistors, so you will not need to worry about providing those externally.


137
OLEDs / Re: NHD-2.7-12864UC & Dev board
« on: September 19, 2016, 10:07:11 PM »
Hello,

I will make a few wiring diagrams tomorrow.
If you want to order the cables I will tell you which ones will work as well.

138
Thats good to hear, luckily the last 2 pins are no connects, so you shouldn't have anything short out on the board.

139
Do not apply 19V to the board.

What is the current allowance for the VDD pin you are applying?

140
Did you try to power this display on with 19.2V at all?

141
The backlight enable pin is not directly connected to pin 2 of the TFT. The Controller itself has a built in voltage booster, which is tied to VDD.

The backlight enable pin can be tied to a GPIO or be left floating for the backlight to power on.

142
Hello,

The backlight enable pin is an external signal that allows you to turn the backlight on or off.
It is normally tied high and will allow the backlight to remain running once VDD and VSS have been applied to the controller.

I did just confirm that this controller board will power the backlight, however it is normally black. Once power is applied to the backlight and the internal drivers of the display; the screen will flash for a fration of a second and go black.

143
This could also have to do with the display either being in Sync or DE mode, or the polarity of the clock.

We have seen the display shift when a the settings above have been changed, can you confirm whether you are using sync or de mode.
Also if you are on the rising or falling edge of the pixel clock?

144
TFTs / Re: NHD-2.4-240320CF-CTXI#-FT in 16 bit mode
« on: August 19, 2016, 08:15:01 AM »
Would it be possible to see your schematic for 16-Bit mode,
Also would it be possible to see the command / data write functions from your code?

145
TFTs / Re: NHD-3.5-320240MF-ATXL with full controller?
« on: August 12, 2016, 04:48:25 PM »
Hello Mark,

Unfortunately we do not have a controller board with an onboard GRAM that coudl be updated serially.
I would recommend looking at a controller chip such as the FTDI Eve: http://www.ftdichip.com/EVE.htm

146
TFTs / Re: NV3035C Dot Clock Lower Timing 6.1MHz
« on: August 09, 2016, 10:40:27 AM »
Writing to the display slower won't necessarily cause problems, however filling the entire display will take longer.
This can also lead to some flickering of pixels which tend to fall first.


147
Character LCDs / Re: 2x NHD-0420D3Z I2C Problem
« on: July 19, 2016, 10:24:07 AM »
Can you also try this without the pull up resistors?

148
Evaluation Tools / Re: NHDev updated support list?
« on: July 18, 2016, 08:48:27 AM »
Unfortunately we do not have an updated list for compatible displays, however I can confirm both of these displays will work with the NHDev Development Board.

149
TFTs / Re: Resistive/Capacitive Touch Screen - Sample Code
« on: July 14, 2016, 07:57:46 AM »
Hi, please email nhtech@newhavendisplay.com for the CTP Code.

Unfortunately it is not that simple to write code for the RTP. I would recommend using an external RTP controller such as the Microchip AR1100: http://www.microchip.com/wwwproducts/en/AR1100

150
Character LCDs / Re: 2x NHD-0420D3Z I2C Problem
« on: July 13, 2016, 12:21:31 PM »
Are there any other devices on the I2C bus?

Last time I heard an issue like this occur; another device on the bus was keeping the logic voltage from reaching a valid logic High for the display.

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