This project shows how to connect an LCD screen to an Arduino Mega 2560 and use potentiometers (knobs) to adjust the screen’s contrast and control an extra function, like brightness. Explaining the ...

The hardware connections include: 1.A 16x2 LCD connected to digital pins 2 through 7 for data and control signals. 2.A 4x4 matrix keypad connected to digital pins 0, 1, 8, 9 (columns) and 10–13 (rows) ...