Just thought that I'd make a quick post about this particular OLED screen:
I've had an issue where plugging it straight into an Arduino Uno R3 caused several power surges on my PC (which luckily didn't fry the USB ports, but disabled them temporarily)
I also had a multiple input one wire sensor system that when I attempted to run a test fell out while I was moving the whole circuit while plugged into an external power source. This lead to the OLED screen heating up alarmingly quickly, burning my fingers.
The circuit that I was testing had the sensors all in series, with the OLED screen running in parallel with it.
I left a 2* review on Amazon saying that the screen caused power surges, but I burnt my fingers yesterday from it.
Fairly sure that a screen like this SHOULD NOT overheat this quickly when it's only rated for 0.05W at 5V. So as someone who's getting back into electronics since I did my GCSEs about 7 years ago, this worried me.
Unless someone says that this can be expected, I will just say that this OLED MUST BE AVOIDED.