Hello! Welcome to my first Instructable! Here I'll be showing you how to make my homemade closable food container that sends a Twitter notification every time your pet goes to eat.
Step 1: Materials
Here's what you need in order to make this work. Now, this project is very flexible, so you can substitute some parts out. Here's what I used:
Rfid tag and sensor
Some jumper cables
An old DVD player, or anything with a DC motor, and keep it's other insides.
Cardboard and any material that you want to house your pet feeder in
A bowl for the food
An ethernet cable
A 9v plugin that's compatible with the Arduino. (So that you can just plug this device into the wall after you get done coding)
Step 2: Preparing the DVD player
Basically, just take apart all of the inner components of the DVD player. I had worked with a rather large one, so I recommend working with one that's a little smaller. Figure out which buttons work the CD tray, and reuse them as your buttons that you'll push to open and close the tray whenever you need to.
This part is pretty self explanatory, just make sure that you "trim the fat" with hardware that you don't need, but salvage anything that you need to keep that CD tray working.
You can see that I saved the power supply cord, the on/off button, the CD tray, and the long circuit board that had the button that opens and closes the tray.
Step 3: Wiring up Everything
Now to just plug everything in!
Connect your ethernet shield to the arduino.
Connect the ethernet shield to your router via ethernet cable.
Connect your arduino to your computer
Breadboard the rfid sensor like in this tutorial:
Also, be sure that you follow the above tutorial completely. It will show you how to get your tag's unique ID number so that your rfid will be able to accept it and do something with it.