#PC-Info-LCD

This project lets you display status signals from a PC to an external LCD character screen.

Firmware for Arduino Nano The backgroud color of the LCD can be adjusted with a potentiometer.

Hardware

Bill of materials

1. Character LCD, 1 pcs.
   • Should be compatible with the HD44780-controller. The LCD used here also has RGB-lighting.
2. Arduino Nano, 1 pcs.
3. 500 kOhm potentiometers, 2 pcs.
   • Used in the user input-gauges.
4. 10 kOhm potentiometer, 1 pcs.
   • To adjust contrast of the text on the LCD.
5. 10 kOhm resistor, 2 pcs.
   • Offset for potentiometers

Circuit diagram

Circuit diagram was made with help from this website: https://www.circuit-diagram.org/editor/

LCD

RegisterSelect = Arduino pin 2 Enable = Arduino pin 3 Data 4 = Arduino pin 4 Data 5 = Arduino pin 5 Data 6 = Arduino pin 6 Data 7 = Arduino pin 7 LED common anode = Arduino pin 8 Red LED cathode = Arduino pin 9 Green LED cathode = Arduino pin 10 Blue LED cathode = Arduino pin 11

Potentiometers

Left potentiometer = A0 Right potentiometer = A1