Hi Joe,

You don't really expect someone here to do your homework for you, do you? The idea of school is to learn, and to learn how to do the research required to arrive at a problem's solution. We'd be doing you a disservice to give you what you ask for.

You want a simple circuit, but what you're asking for isn't a "simple" circuit. The messages in this thread should have given you a start. You didn't say whether you've had any microcontroller experience; from the tone of your request I'd guess not. Try working out a design then come back with questions as you try to get it working.

With an effort being made on your part, and specific questions regarding circuit and code issues, you will find us very helpful.

Work hard, and good luck!

Dennis