Starting out with the MEGA 2560

[alto777]

Please read

LCD contrast not working and not displaying text

Jenuvandermerve 14h (post deleted by author) No, that is the point. [image] Not only do you not need to connect all three pins of the potentiometer, but that makes contrast setting much more difficult and wastes current which may not matter if using a mains supply, but does if using batteries. And the proper variable resistor value is 1k. If you are experimenting with a 10k potentiometer, it actually works well to connect both ends to ground!

The contrast pot does not need a connection to Vcc according to some guy who may have known what he was talking abuot.

a7