Hello
I have recently 1 Arduino AT mega Uno R3 ELEGOO 320P
it is connected to the USB port of the pc and to the power supply 5 v
I just realized a little program with arduin and Ldc1602
the compilation is done without worry.
When I remove the USB cable the arduino is powering the Lcd too but more program
If I reconnect the Usb port the program works
What I forgot to do
Thank you for your help
Exolite