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1
OLEDs / Supply voltage for KZW series OLED
« Last post by MustardMan on Today at 02:33:50 AM »
Hi,
Searched but found no answers to my question:

I am designing for a KZW series "5" version because the "3" version is almost impossible to actually buy. The "5" datasheet states the supply voltage range as 4.8 to 5.3 volts, nominal 5.0 volts.
However, the reseller (Digikey in this instance) states the displays will operate from 3v to 5.3 volts...
>> so who is right?
>> have newhavendisplay updated their design but not updated the datasheet (with their last update in March this year!!)?

I am doing a new design to replace an LCD. Reliability is king, and the LCD would fail at high temperature. I *do not* wish to just go with a 3.3 volt supply and *hope it works*. I need to design this thing to always work!!

The (old) LCD is a 5v part, but the micro drives signals at 3v3. The specs for the LCD state this is fine... but not so with the OLED (0.8 x Vcc) for Vih. Thats 4 volts for Vih...

To design properly I either need to drop the supply to 3.3 : but will the display work at this voltage?; or
Level translate the logic signals to the display and run the whole thing at 5v.

As per usual, I'm really under the pump to deliver a design.

Many thanks for taking the time to read, and even better if you can respond.

PS: the "CW" 2.8 volt displays are also available, but the suppliers' (both Digikey and Mouser) stock is worryingly low.
2
Evaluation Tools / Re: NHD-4.3CTP-SHIELD-N
« Last post by Paul_B 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 (Blink.io)?

Thanks!



3
Evaluation Tools / Re: NHD-4.3CTP-SHIELD-N
« Last post by CarlW on August 22, 2017, 02:50:44 PM »
Still on the topic of this shield.

 ;)

I found an Arduino clone (NERO at Digikey) with a stronger 5V power regulator.
Doesn't get warm, really.

My issue is fitting my sketch into the space on the UNO. My sketch compiled to...
"Sketch uses 24772 bytes (76%) of program storage space. Maximum is 32256 bytes.
Global variables use 912 bytes (44%) of dynamic memory, leaving 1136 bytes for local variables. Maximum is 2048 bytes."
Thought it might work but no. Loads fine but crashes after a few seconds.

I also tried the library example sketch FT_App_Lift.
"Sketch uses 20844 bytes (64%) of program storage space. Maximum is 32256 bytes.
Global variables use 869 bytes (42%) of dynamic memory, leaving 1179 bytes for local variables. Maximum is 2048 bytes."
Doesn't work for me either. Loads fine but crashes after a few seconds.

Surprisingly, library example FT_App_Jackpot works.
"Sketch uses 21434 bytes (66%) of program storage space. Maximum is 32256 bytes.
Global variables use 1159 bytes (56%) of dynamic memory, leaving 889 bytes for local variables. Maximum is 2048 bytes."

All the sketches compile and run fine on the MEGA.

Where can I find a MEGA with a powerful 5V power supply?

Has anyone else had stability issues with library example sketches on an UNO?

4
Graphic LCDs / Re: NHD-C160100DiZ and Raspberry Pi
« Last post by Saurabh_B on August 21, 2017, 02:12:30 PM »
Hello Joel,

1. Yes the display will work at 100khz
2. The supply current is dependent on what the display is showing and how far you are using the voltage booster, it can use up to 1 mA of current when fully powered.
3. This display does require 2 capacitors. can you tell me if you have both connected the way they are shown on page 4 of the datasheet?
4. You can find example code for this display here: NHD-C160100DiZ
5
Hello Joel,

1. Yes the display will work at 100khz
2. The supply current is dependent on what the display is showing and how far you are using the voltage booster, it can use up to 1 mA of current when fully powered.
3. This display does require 2 capacitors. can you tell me if you have both connected the way they are shown on page 4 of the datasheet?
4. You can find example code for both of the displays here:
NHD-C0220BiZ
NHD-C160100DiZ
6
hello guys,
i need to know whether
1)Can lcd  be implemented with 100 kHtz?
2)Do supply current (Idd) need between 500 microA to 750microA to drive the lcd? since my supply voltage is 3.3 v but the current is less than 500microA?
3) As per the instructions i have connected the lcd  but i am not getting any display in lcd?in the setup i have used pull-up resistor as 10kohms and the capacitor is 1uF.
4) if you have any sample code which is implemented with i2c-dev than please share it.
4) if there any other suggestions,please provide for NHD-C160100Diz.
7
Graphic LCDs / Re: NHD-C160100DiZ and Raspberry Pi
« Last post by joel dey on August 21, 2017, 08:44:56 AM »
hello guys,
i need to know whether
1)Can lcd  be implemented with 100 kHtz?
2)Do supply current (Idd) need between 500 microA to 750microA to drive the lcd? since my supply voltage is 3.3 v but the current is less than 500microA?
3) As per the instructions i have connected the lcd and run the code, but i am not getting any display in lcd?in the setup i have used pull-up resistor as 10kohms and the capacitor is 1uF.
4) if there any other suggestions,please provide for NHD-C160100Diz.
8
Character LCDs / Re: NHD-C0216CiZ-FN-FBW-3V No ACK
« Last post by Saurabh_B on August 15, 2017, 08:26:40 AM »
Currently working on this via email with customer.
9
OLEDs / Re: spontaneous reverse mode with NHD-0420CW
« Last post by Saurabh_B on August 15, 2017, 08:25:30 AM »
The options that would allow you to remap the output would include the Entry Mode set as i mentioned in my previous post, along with the Set SEG Pins Hardware Configuration command on the OLED Command Set Table (RE = 1, SD = 1)

Attached is the layout for the COM and SEG lines on our OLED.
The Segment Remap command is better explained on Pages 33 & 34 of the controller datasheet (http://www.newhavendisplay.com/app_notes/US2066.pdf)
10
OLEDs / Re: spontaneous reverse mode with NHD-0420CW
« Last post by jcasey on August 14, 2017, 02:06:13 PM »
I can easily modify the init sequence.   Can you recommend some specific strings of characters to add?
I originally used the init sequence recommended in the manual -- the reversal is not supposed to occur on powerup.
I did find that the one appended command i showed solved the problem I originally had (occasional boot up reversed).
Now it appears to always come up reversed...again, this is not supposed to happen.

However, if I can change the init sequence, I'm happy to.   If there are several ways it can become corrupted backwards, what are ALL the commands to make it right-side up and left to right?
I find the manual to be a bit obtuse, and clearly I missed some items.
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