One downside to OLED screens is that they're susceptible to burn-in. This is where one image stays on-screen so long that it becomes indelibly 'burned' into the screen – think the BBC logo if you watch too much of the BBC News channel. With tandem OLED, each layer actually operates ...
As mentioned earlier I2C has two connections: SDA and SCL. They work by sending data to and from the SDA connection, with the speed controlled via the SCL pin. I2C is a quick and easy way to add many different components, such as LCD / OLED screens, temperature sensors and analog to d...