Switching Alterative Light On using a Computer

I am totally new to Arduino. I want to use a computer to turn alterative lights on and off. When the computer sets out one signal a green light is turned on. When an alterative sign is sent a red light is turned on. We need to also check if the system is working so that when we are testing the system a yellow light turns on. When no signal is detected all three lights are off. is this possible?


Hi Harold,

That’s definitely achievable. Checkout this great little beginner project:

It sounds like it’s just what you’re after!