Pencil Holder

i made a custom pencil holder and it will remind you to put your pencil back in the holder. There is a button in the bottom of the holder and if a pencil drops in a light will not light up which means you slready put it in. If you didn't put it in the light will light up.

a cardboard, ardunio, few wires, and some pencils

first I connect the wires in the ardunio and cut 4 small piece of card and tape it together to made the holder. Next, tape a wire with a light bulb on it to the side of the holder. Then, cut a small holde at the bottom of the holder, then stick a botton with the wire into the hole. Finish.