I bet this subject has been through before, but I couldn't find it anywhere. I'm using Arduino Nano V3. I have some LEDs, Buttons and an OLED on it (Small, 4pin one, simple). The project fine works on the micro-USB. But I want to use a battery (4xAA or 9V- I read that they work similar, just 9V is ineffective). I did connect on Vin and Gnd, but the OLED does not seem to turn on. Board LED near "ON" lights, but nothing else seems to happen. Should I somehow power the OLED through the battery directly? Right now, the OLED has pin connected to 3V3 on the Arduino.
If any links or advice, would need it gladly. And Thank You in advance :)