The display is powerd with 5V. Not only the backlight, also the UART should have 5V. I measured onla 3.5V with my Multimeter, but i am not sure hoe quick the Multimeter is- there may be peaks of 5V. So you would agree that i was just luck so far?
The display is powerd with 5V. Not only the backlight, also the UART should have 5V. I measured onla 3.5V with my Multimeter, but i am not sure hoe quick the Multimeter is- there may be peaks of 5V. So you would agree that i was just luck so far?