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OLED voltage levels...
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alank2:

--- Quote from: Fungus on October 02, 2015, 06:26:21 pm ---In the datasheet they mention three different brightness levels, FWIW.

--- End quote ---

I missed that which datasheet and where?  I've seen something about 256 levels in a few sheets.
alank2:
It is working now.  I tried a loop with all 256 steps and it kept increasing smoothly until rolling over and then I tried 8 steps from low to high and you can see each of those steps too.  Pretty cool little displays to play with.  I love that they emit light like a LED, but with fairly low power consumption.
Fungus:

--- Quote from: alank2 on October 02, 2015, 06:39:10 pm ---
--- Quote from: Fungus on October 02, 2015, 06:26:21 pm ---In the datasheet they mention three different brightness levels, FWIW.

--- End quote ---

I missed that which datasheet and where?

--- End quote ---

The one you posted, page 7: http://www.buydisplay.com/download/manual/ER-OLED0.49-1_Series_Datasheet.pdf


--- Quote from: alank2 on October 02, 2015, 06:39:10 pm ---I've seen something about 256 levels in a few sheets.

--- End quote ---

256 possible values in a register doesn't always mean they use all 8 the bits in hardware. eg They might only use 2 of them.
amyk:
Those are just a sample of the lifetime vs contrast graph. The controller has true 256-level gradation.
Fungus:

--- Quote from: amyk on October 03, 2015, 01:55:27 pm ---Those are just a sample of the lifetime vs contrast graph. The controller has true 256-level gradation.

--- End quote ---

Apparently so.

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."

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