Stephanie wrote:You could use the 3.3v output to power the OLED but the SPI signals on the Arduino will still be at the full 5 volts which is too much for the OLED display. The purpose of the level shifter is that it reduces voltage on all the signal lines to 3.3v, not just the source voltage.
If you really don't want to use the level shifter, then you can mod your Arduino so the whole thing runs at 3.3v - and coincidentally LadyAda has a tutorial for this: http://www.ladyada.net/library/arduino/3v3_arduino.html
adafruit wrote:no, it must be driven from the arduino to display anything
follow our tutorial to use the display
adafruit wrote:you need to provide us more details and/or photos
songlight wrote:I am driving everything from 3.3 volts off the Arduino nano but I get nothing on the screen. Also the software demo program you list will not load as it says there is an error. I don't know what to do next.
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