This instructable will show you how to make my arduino "get off my property" machine. The sole purpose of this machine is to remove objects placed on it. The video above explains this very well.

Step 1: Supplies

Materials:

X2: 7cm * 9cm PCB's
Some duct tape (colored if you want it to look nice)
X1: 27Kg servo (other servos will work, but this is able to easily push pretty much everything you put on it)
X1: Arduino UNO, with battery
X1: breadboard
X1: 6v battery pack (recommended if you have a small servo, mandatory if you have a big servo like mine), (make sure your servo is capable of this voltage)
X1: push-button
Some male to male arduino connector leads (at least 10)
X1 10K Ohm resistor
Some wire (must be able to fit in a breadboard)
A small cardboard box (like the one in the video) (a shoebox might also work)

Tools:

A soldering Iron
Wire strippers
Computer (capable of programing arduino)

Step 2: Building the Pressure Plate

Take a PCB and put the push-button in the center.
Solder 3 6in lengths of wire to the push-button's leads
Decorate the other PCB
Duct tape the two PCB's together (the closer they are together, the more pressure is on the button and the more sensitive it will be)
Pressure plate complete!

Step 3: Programming Arduino

Upload this code to your arduino UNO.

StayOffMyPropertyMachine.ino
Download

Step 4: The Circuit

Okay this circuit is actually really easy.

First you need to hook up your pressure plate to your arduino as shown in this link:
http://arduino.cc/en/Tutorial/Button
Next, connect your servo's data wire (orange or white) to digital pin 9 on the arduino
Then, connect your battery pack to the positive and negative wires on the servo
Then, connect the ground of the battery pack to the ground of the arduino
Then, Your done! move on to the next step!

Step 5: Prepping Your Box

Cut a hole on the left side of the box that is big enough to fit your pressure plate wires through
Cut a hole on the right side of the box that is big enough to fit your servo wires through
Mount your pressure plate where you cut the hole for it (I duct taped mine down)
Mount your servo behind the pressure plate so it is able to push things off of the pressure plate (I used Velcro and duct tape to hold it on)
Extend the arm of your servo (I just duct taped some extra wire on, but many other things will work)

Step 6: Finishing Up

Put all of your electronics in the box, then connect up the servo and pressure plate
Test to see if it works
Adjust the servo arm so that when the pressure plate is not pressed the arm is out of the way, and when it does get pressed the arm moves completely over the pressure plate
Adjust the pressure plate (add weight or tape the top PCB down a little more) so that when a very light object is placed on the pressure plate it will still trigger
Decorate your box
Tell someone to put something on the pressure plate and watch as the servo pushes it off