Instructables
Picture of Tailgate Opener
In this instructable, you will learn how to make a regular tailgate into a automatic tailgate.
 
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Step 1: Materials

Picture of Materials
hookup_wire.jpg
potentiometer.jpg
tip120_transistor.jpg

Here are the materials you will need for this project:

-Parallax Homework Board
-Tailgate
-12V Car Battery
-9V Battery
-DNA Motoring Central Lock System (3 slave 2 wires-actuators, 5 wires actuator, and 1 master)
-Power Diodes(X10)
-10k Ohm Linear Taper Potentiometer
-TIP 120 NPN-D Transistor
-Extra Wire(22 AWG Hook-up Wire) 
-Electric Tape
-Industrial strength Velcro
-Duct Tape
-WD-40

http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads
http://arduino-for-beginners.blogspot.com/2011/03/controlling-12v-dc-motorfan-with.html


potentiometer                       Power diodes     
10Kohm potentiometer        power diodes 
  










 

 




Step 2: Step One

Picture of Step One
FIrst, you must remove the tailgate and remove faceplate from the tailgate,make sure you understand how the tailgate works. Do research on how a tailgate and actuator works

Step 3: Step Two

Picture of Step Two
Remove the bars that connect to the handle of the tailgate

Step 4: Step Three

Picture of Step Three
Velcro Actuators inside of tailgate, make sure the actuators are at a 45 degree  angle pointing down.

-For extra grip, you can use the duct tape.

Step 5: Step Four

Picture of Step Four
Attach the bars to the actuators

Step 6: Step Five

Picture of Step Five
Plug in actuators

Step 7: Step Six

Picture of Step Six
Connect the wires from the actuators to the Homework Board, then hook those to the battery.

Step 8: Step Seven

Picture of Step Seven
Now it is time to wire up the Homework Board, First, get about 5 feet of hookup wire, the TIP 120 transistor, the power diodes, the 10k ohm potentiometer, 12V car battery, and the 9V battery.

Notes:
-you only need one power diode, the rest are in case one of them burns out.
-If you get the same power diodes and potentiometer that we got, you will need to solder the diodes to some hookup wire.
-The potentiometer is adjustable, adjust it accordingly to how much power you want 


Here is a useful website for wiring the board up:
http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads

Step 9: Step Eight

Picture of Step Eight
Solder all of the necessary wires together, the hookup wire to the diodes and the potentiometer, then some extension wires from the tailgate to the to the battery(hookup wire will work fine).
very cool, do you have any videos of it in action? also why did you need to it be automatic?