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Messages - Saurabh_B

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Graphic LCDs / Re: NHD-C12864WC-FSW-FBW-3V3 booster
« on: September 24, 2015, 09:40:03 AM »
HI, is that 6V what you're seeing at Vout?

Also what type and values of capacitors are you using?

TFTs / Re: NHD-7.0-800480EF-ATXV#-CTP power supply
« on: September 24, 2015, 09:23:19 AM »
Hi Larry,

You shouldn't have any issues running both at 3.3V

OLEDs / Re: Shift position after "clear screen" instruction
« on: September 18, 2015, 03:50:30 PM »
I would take a look at page 22 on the Datasheet of the display for a example initialization sequence. The sequence does address the flipped bits. I would suggest adding those along with what you already have.

I will wire one up to see if I can recreate what you were seeing.

OLEDs / Re: Shift position after "clear screen" instruction
« on: September 18, 2015, 12:16:51 PM »
This might have something to do with the initialization of the display. This seems like it might be an issue with the Entry Mode command where the display isn't incrementing the position after a datawrite properly.

If you are sending an initialization sequence can you post that as well?

OLEDs / Re: Shift position after "clear screen" instruction
« on: September 17, 2015, 04:37:55 PM »
I was wondering if you could post a picture of what you are seeing.

OLEDs / Re: Instruction execution time for slim OLEDs?
« on: September 17, 2015, 04:23:32 PM »
I would say follow the timing diagrams.


Unfortunately we do not have a 16 bit controller board for the 5.7" TFT displays. However the NHD-5.7-320240WFB-ETXI#-1 does come with a 16 bit controller.

And for the month of September we have a 10% off sale on all of our TFT displays if you were interested in this display.

OLEDs / Re: Calculation of Font Addresses Multi‐Font Displays Help!
« on: September 11, 2015, 10:54:16 AM »
Hi, Here is some information if it can help at all:

  • The dummy Variable is 0xFF
  • You would want to save the information coming back from the MF Chip into an 8X8 Array. The MF chip will give you 8 sets of bytes. With the bytes, B0-B7 will be the font information.
  • The bits will be vertical, so you could display the information one of 2 ways, either using the bit that corresponds with the line you are currently writing and go horizontally, or go through each bit and write vertically

You wouldn't have to, the 6.8 ohm resistor is dropping the voltage down by 0.72 V so voltage drop across the backlight is 4.28V.

I just hooked up a the sample which I used to confirm the resistance to a power supply. While at 5V it is using 125 mA. so in this case the resistor is dropping the voltage by .75V, from which the backlight has a drop of 4.25V. You can attach a potentiometer to pin15 to drop the voltage further and decrease the brightness if you would like.

Character LCDs / Re: software controlled contrast is not consistent
« on: September 10, 2015, 12:31:38 PM »

The hardware will play a role in the contrast. The 2 capacitors are part of a booster circuit that steps up the voltage required to create the contrast.

I was wondering how big of a difference you are seeing in the contrast? If possible to take a picture comparing 2 displays.

Also are there any differences between the boards on which the displays look a little bit darker? (Voltage, Resistance, or capacitance)

It is a 6.8 Ohm Resistor.

Hi Gregory,

It looks like were having trouble sending an email to you last night, but you want to have the backlight anode connected to pin 15. The on resistor is in series there, if you apply the power to the A directly you could damage the backlight.

OLEDs / Re: Calculation of Font Addresses Multi‐Font Displays Help!
« on: September 08, 2015, 09:45:34 AM »

I am looking into this, but your logic seems fine. I would stick to using the dummy variable that is in the Multi-Font display spec.

OLEDs / Re: Troubleshooting Help
« on: September 03, 2015, 08:00:22 AM »
Would it be possible to get a pin-out diagram, along with your initialization routine?

TFTs / Re: NHD-5.0-800480TF-ATXL-CTP Yellow Tint
« on: September 02, 2015, 07:58:00 AM »

I was wondering if you could post a picture of the 7" display to see what the original image is supposed to look like, and also if you have tried this with another 5" display.

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