One more suggestion: if we use an Arduino PWM pin as the common anode pin, we can power on/off the display and change its brightness. What if using Common Cathode Display. If we put in the sockets ...

Now to the hardware setup that consists of an Arduino Uno and a 128 × 64 I 2 C OLED display. The OLED display used is a 5-V tolerant type with just four pins: VCC, GND, SDA, and SCL. You can, of ...