Hi, I’m Hang Yu
My project is to make a reliable visitor counter for our makerlab in Business Faculty building. I am going to use is Arduino uno.
What you need:
1, arduino compatible photosensor
2,LED at pin#13 to notify if it’s blocked
Plus, Second, it would be great to build a LCD screen displays the number it counts:
Third, the circuit of laser diode is independent from Arduino and it’s easy to build on bread board.
I am going to work on my project during the summer break.