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Messages - mbrinks

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OLEDs / Re: NHD-2.8-25664UCY2 PCB revisions?
« on: August 27, 2014, 04:32:25 AM »
No, I didn't try a 2nd module. The problem is not the particular module I have, but the product design.
This is why I inquired about a new version of the product.
As far as I know Newhaven has not fixed the problem.

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OLEDs / Re: NHD-2.8-25664UCY2 PCB revisions?
« on: April 22, 2014, 02:03:52 AM »
I derived the information by simply following the PCB traces and by measuring resistance between components.

I would have to disagree on the module "making a complete and fully functional OLED module".
The module can under certain conditions be made to work in a more or less stable way. I suspect the reason it can function at all, is because the SSD1322 internally connects VSS and VLSS and the VDDIO supply will get some power through internal protection diodes from I/O pins. This is however not a solid design and violates requirements in the SSD1322 datasheet.


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OLEDs / NHD-2.8-25664UCY2 PCB revisions?
« on: April 21, 2014, 04:47:22 AM »
Some time ago I bought a NHD-2.8-25664UCY2 at Digikey. The PCB is labeled "VER1.1".

The PCB has many problems with supply pins on the OLED module not having correct connections.
Problems I have found:
VLSS (pin 5 & 28) not connected to VSS.
VDDIO (pin 24) not connected to supply.
VDD (pin 25) is not connected to a decoupling capacitor.

Has a new revision been made, correcting these problems?

Best regards,
Michael

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