Hello,
I'm trying to create a laser trip wire that will light an led in my room when someone goes up the stairs. I know that I need a laser and a photo transistor but how would I set this up. Please I don't know much about circuitry so explain thoroughly.
I'm trying to create a laser trip wire that will light an led in my room when someone goes up the stairs. I know that I need a laser and a photo transistor but how would I set this up. Please I don't know much about circuitry so explain thoroughly.