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OLED voltage levels...

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alank2:

--- Quote from: Fungus on October 03, 2015, 04:50:40 pm ---But when I wrote the original post the OP was saying: "I made it step from 0x00, to 0x8F, to 0xFF, but I only see two brightness steps and only see two distinct steps when monitoring current."

--- End quote ---

I must have done something wrong for that, not sure why.  It is working now and definitely has the 256 steps.

I guess the question is, does using the contrast setting OR adjust the iref resistor both accomplish roughly the same thing?

amyk:

--- Quote from: alank2 on October 03, 2015, 05:44:58 pm ---I guess the question is, does using the contrast setting OR adjust the iref resistor both accomplish roughly the same thing?

--- End quote ---
Iref is the "master contrast", it sets the maximum current. The contrast setting divides that into 256 steps.

reetpetite:
Hello alank2 and all other contributors,
I bought the same displays and I am struggling to connect them properly. What do you mean by “uc” on pins 9, 10, and 11?
Best regards

alank2:
By uc I mean microcontroller.  Those pins need to go to a general purpose I/O to reset it and the other two to the i2c interface on the microcontroller.  Good luck!

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