Make your life easier with a door that closes with the right amount of sound. In our Engineering Design class we are currently working on a project where we have to design a smart product that uses sensors. Our group came up with the idea to use a sound impact sensor that can detect sounds to close a door. The idea is for the sensor to detect sounds and the door will close. The main application for this product is in a classroom setting, but it also has multiple other uses. The main purpose is for teachers to use when teaching a class with the door open. Teachers have to stop teaching when the hallway is suddenly filled with noisy students to walk across the room and shut the door. No longer will they have to stop class to close the door, the door will now close own its own when noisy students fill the hall.
Step 1: Materials
-1 9 Battery
-1 9v Hobby Motor
-1 Plastic Wheel from Parallax item #721-00001
-1 HomeWork Board from Parallax item #555-28188
-1 Sound Impact Sensor from Parallax item #29132
-1 Solderless Breadboard from Parallax item #700-00078
-1 H-Bridge from Parallax item #603-00019
-2 Alligator Clips from Radioshack item #270-378
-Jumper wires from Parallax item #800-00016
-Spool of Wire from Home Depot (For wiring the sensor through the door frame and the wiring too long for the jumper wires.)
-Basic Stamp Editor v2.5.3
-2 L Brackets from any hardware store.
We also used various sizes of wood, but that is for our model door.
The motor listed above meant for our scaled down model door and will not likely work on the bigger or heavier doors, but may work on normal doors that are light weight. For the bigger and heavier doors you might want to use a motor with more power and maybe a bigger wheel.