Powering OLED SSD1306 with external 9V

[Makizard]

Hello,

I am new to the forums and I would be very grateful for any help. I am a novice at electronics and I seek to power the SSD1306 OLED (http://www.adafruit.com/products/326) with a external voltage of 9V through an Arduino UNO. I previously attempted this and burnt out a logic shifter + OLED by foolishly attaching 9V to the logic.

Do I deactivate the charge-pump by attaching Vbat with Vdd. Plug in a AC/DC 9V power source and wire the Arduino UNO Vin to Vcc?

Thank you for any help and/or advice.

[adafruit]

we dont suggest it - the built in booster works great and is pretty efficient!

[Makizard]

Hello Adafruit,

Thank you for the advice. However, I want to make the screen as bright as possible. Is there a way to achieve this?

[adafruit_support_bill]

I want to make the screen as bright as possible. Is there a way to achieve this?

bright as possible for how long? Over-driving a display will dramatically shorten its lifetime. The built-in circuitry keeps the display current at an optimum safe level.

The manufacturer recommends a resistor change if supplying 9v directly to VCC. The details are in the user's guide.
http://www.adafruit.com/datasheets/UG-2864HSWEG01%20user%20guide.pdf

[Makizard]

Hello again,

I wanted to know what is the wiring that I have to do to achieve the 9V to drive the screen. Apparently the project doesn't care much for the life-span of the device. Without replacing the resistor, how would I wire it?

I started with the wiring presented in the adafruit tutorial (http://ladyada.net/products/oled12864/) using USB-power and then wired a 9V battery straight to the VCC. The screen turns off and the OLED heats up significantly (to the point of burning). I am obviously doing something wrong.

Sorry for my newbie questions...

Thanks again for any and all support ~

[adafruit_support_bill]

The resistor change is necessary to maintain the current at a safe level.

From pages 4-6 in the controller reference manual:

* R1 should be replaced as 560kΩ while supplying 9V on VCC externally.
...
IREF:This is segment output current reference pin.
A resistor should be connected between this pin and VSS to maintain the IREF
current at 12.5 uA.