How To Make a Smart Fridge

This is a school project that we made to help people know when they need to buy food. It is a small wooden shelf that you put on top of your refrigerator shelf. When food is low, an LED lights up, letting you know. It is cheap and easy to make. and fun!

Step 1 Materials

You will need:

1.) One LED (any color) if you can't find any go to this instructable http://www.instructables.com/id/Where-to-find-LED-lights-Not-In-Shops/

2.) Thin plywood cut to a square that will fit in your fridge

3.) a battery holer/pack (just one battery will work, but wear out quickly)\

4.) One micro switch. It is a button that can be wired into a circuit

5.) Copper electrical wire and electrical tape (a solder would be better)

6.) wire clippers

7.) large springs