Hello,
I've recently been given a project in a fairly beginner electronics class. I have to use a potentiometer to light a green LED in the extreme clockwise position, yellow in the extreme counterclockwise position, and red when it is at the center position. I can do this using analog or digital. Any suggestions? Any help would be greatly appreciated.

 

Hi,

A window comparator would be an easy way to do it.

 

Do you have a choice as to the value of the potentiometer?

Have been given a specific set of power supply voltages you must use?

Are you free to choose your own LED lamps or are they pre-specified?

hgmjr

 

Yes, I do have a choice as to what potentiometer to use, and we must use 9v battery. Also, the LED lamps are pre-specified.

 

This is a class project so I didn't include any values or the 5V reg that powers this from a 9V bat. This is the Picaxe 08M microcontroller wired up and programmed as an ADC that will do what you want easily.

http://www.rev-ed.co.uk/picaxe/