I am a beginner working on a project in which I have purchased a device that can display 4 colors on the display (blue, green, yellow, or red). I would like the Arduino to read what color is on the display and depending on the color supply power to an attached motor. For example, if the screen is green supply power to the motor, if screen is yellow or red or blue do not supply power to the motor.
On the circuit board of the attached device there are clearly labelled wires connecting the LCD display to blue, green, and red LED solder points.
Is it possible to read the current going through these wires to determine what color would be displayed on the LCD display? If not, are there any other suggestions which could work?
As I mentioned earlier, I'm a complete beginner so anything would help. Thanks.