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Messages - Paul_B

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166
Character LCDs / Re: NHD-0212WH-ATMI-JT# on 3.3V
« on: June 10, 2015, 02:00:01 PM »
Hi Dave,

Glad to hear, thank you for posting an update  :)

167
OLEDs / Re: NHD-0420CW-AG3 Pixel Test
« on: June 05, 2015, 07:39:57 AM »
Not a problem, have a good one!

168
OLEDs / Re: NHD-0420CW-AG3 Pixel Test
« on: June 04, 2015, 08:39:08 AM »
Hello,

Burn-in (as in ghostly image) is a more susceptible to OLED displays, however it can still occur with standard LCD's.

The length of time required for noticeable screen burn to develop varies due to many factors. It can take as little as only a few weeks for noticeable ghosting to set in, especially if the screen displays a certain image (example: a menu bar at the top or bottom of the screen) constantly, and displays it continually over time.

Please note that screen burn-in can easily be avoided, you may want to think of a plan to reduce long-term display in the same place on the screen.

Below are a few simple steps you can take to prevent burn-in:

E.g. In your case maybe install a PIR sensor to turn off the display when no one is in proximity of the unit.

E.g. Enable the OLED's built-in scroll feature.


Finally, Karma points are given by members to other members for any reason, usually for answering or posting a helpful question  8)

169
OLEDs / Re: NHD-0420CW-AG3 Pixel Test
« on: June 03, 2015, 08:33:47 AM »
Hello,

I have seen similar behavior before usually caused by ESD (Electrostatic Discharge) damage to the module / controller. Unfortunately in this case the damage is irreversible, generally devices with finer geometries are more susceptible to damage from ESD.

I always recommend working on a static-safe work bench and following the appropriate procedures to ensure your device is protected from ESD. This includes grounding enclosures, bezels, etc ...

Finally, can you please tell me what steps you took to ground your devices as a whole?

Thanks!







 

170
Hello,

To answer your question yes, it is definitely possible. If you have some shorter jumper wires on hand it wouldn't hurt to swap them out.

However, I do not believe this is the culprit  ;)

171
Hello,

Regarding your first post, can you please tell me if your MCU has built-in pull up resistors?

If so it is possible that it could be causing a weak pull-up.

Finally, I recommend you use 10k Ohm resistors. If you get no response we will continue to debug  8)

Thanks!



172
OLEDs / Re: OLED dark horizontal bands
« on: May 14, 2015, 08:15:23 AM »
Hello Edwin,

Since these OLEDs are passive matrix displays unfortunately there will always be slight banding. You can reduce the effect by adjusting the registers like you previously stated.

173
TFTs / Re: NHD-5.0-800480TF-ATXL#-CTP backlight Driver
« on: May 13, 2015, 05:05:39 PM »
Hello,

There are no discrepancies within the NHD-5.0-800480TF-ATXL datasheet.

The backlight supply current values are: Min - 45, Typ. - 60 and Max. 75 mA

There must be an issue with your wiring or backlight circuit. Please note you have to limit your current. The reason your display is getting hot is because the supply current is 250mA.  :o





174
Character LCDs / Re: NHD-C0220Biz and Arduino/Teensy3.1
« on: May 13, 2015, 07:52:28 AM »
Hello,

I'm sorry to hear about the issue you encountered. We have a set quality control process that is followed for every part so I'm not sure how this one got through, but we will make a note to double-check this type of issue during our QC inspections. I apologize for the inconvenience.

Please contact:

quality@newhavendisplay.com

Thanks!

175
TFTs / Re: NHD-2.4-240320SF-CTXI#-FT1
« on: May 12, 2015, 02:15:46 PM »
Hello,

Pin 14 (DB0) is the LSB (least significant bit) of the data byte.

Pin 29 (DB15) is the MSB (most significant bit) of the data byte.

Hope this helps!

176
Vacuum Fluorescent Displays / Re: "C-20-503F" vfd NEWHAVEN
« on: May 12, 2015, 12:24:53 PM »
Hello,

Thank you for the datasheet! This was a custom design which is why I did not recognize the part number.

Please note this is a non-stocked part, there will also be a MOQ (Minimum Order Quantity) when placing an order.

If you would like more information please contact me below:

pbartek@newhavendisplay.com

Thanks!

177
OLEDs / Re: NHD-0420CW With PIC32MX Controller
« on: May 12, 2015, 09:37:32 AM »
Excellent, thank you for the clean wiring diagram  ;)

The good news is that your wiring is correct, the issue must be within your code.

Your initialization appears to be correct, I suspect the problem is how your SPI is configured.

SPI Example:

Code: [Select]
case 2:   
              temp = 0xF8;
              for(i=0;i<8;i++)
              {
                digitalWrite(SCLK, LOW);
                if((temp&0x80)>>7==1)
                {
                  digitalWrite(SDIN, HIGH);
                }
                else
                {
                  digitalWrite(SDIN, LOW);
                }
                temp = temp << 1;
                digitalWrite(SCLK, HIGH);
              }
 
              for(i=0;i<4;i++)
              {
                digitalWrite(SCLK, LOW);
                if((c&0x01)==1)
                {
                  digitalWrite(SDIN, HIGH);
                }
                else
                {
                  digitalWrite(SDIN, LOW);
                }
                c = c >> 1;
                digitalWrite(SCLK, HIGH);
              }
              for(i=0;i<4;i++)
              {
                digitalWrite(SCLK, LOW);
                digitalWrite(SDIN, LOW);
                digitalWrite(SCLK, HIGH);
              }
              for(i=0;i<4;i++)
              {
                digitalWrite(SCLK, LOW);
                if((c&0x01)==1)
                {
                  digitalWrite(SDIN, HIGH);
                }
                else
                {
                  digitalWrite(SDIN, LOW);
                }
                c = c >> 1;
                digitalWrite(SCLK, HIGH);
              }
              for(i=0;i<4;i++)
              {
                digitalWrite(SCLK, LOW);
                digitalWrite(SDIN, LOW);
                digitalWrite(SCLK, HIGH);
              }
              break;
  }

If you have an oscilloscope on hand I highly recommend checking your data lines and posting some screen shots.

178
TFTs / Re: Enabling Built In Self Test - BIST
« on: May 12, 2015, 09:08:29 AM »
Hello,

I'm sorry, the BIST (Built In Self Test) pin is not accessible through the FPC cable.

179
OLEDs / Re: NHD-0420CW With PIC32MX Controller
« on: May 12, 2015, 08:05:22 AM »
Hello Docmur,

Thank you for reaching out, can you please post your full pin-out.

Based on the configuration you listed below it would appear that you have forgotten to Gnd BS0-BS2 (MPU interface pin selection).

Next, your LCD init function does not appear to be complete. I recommend taking a look the the following example Arduino code for that particular display.

https://github.com/NewhavenDisplay/NHD_US2066

Hope this helps!



180
Vacuum Fluorescent Displays / Re: "C-20-503F" vfd NEWHAVEN
« on: May 12, 2015, 07:49:14 AM »
Hello,

Thank you for reaching out! I'm sorry, unfortunately we do not sell that particle VF-Display. However if you link the datasheet I might be able to find a comparable replacement.


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